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Dell OptiPlex Tower Plus 7020 Owner's Manual
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Dell OptiPlex Tower Plus 7020 Owner's Manual

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OptiPlex Tower Plus 7020
Owner's Manual
Regulatory Model: D31M
Regulatory Type: D31M001
February 2024
Rev. A00

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Summary of Contents for Dell OptiPlex Tower Plus 7020

  • Page 1 OptiPlex Tower Plus 7020 Owner's Manual Regulatory Model: D31M Regulatory Type: D31M001 February 2024 Rev. A00...
  • Page 2 A WARNING indicates a potential for property damage, personal injury, or death. © 2024 Dell Inc. or its subsidiaries. All rights reserved. Dell Technologies, Dell, and other trademarks are trademarks of Dell Inc. or its subsidiaries. Other trademarks may be trademarks of their respective owners.

  • Page 3: Table Of Contents

    Contents Chapter 1: Views of OptiPlex Tower Plus 7020................7 Front....................................... 7 Back......................................8 Chapter 2: Set up your OptiPlex Tower Plus 7020.................11 Chapter 3: Specifications of OptiPlex Tower Plus 7020..............17 Dimensions and weight..............................17 Processor..................................... 17 Chipset....................................18 Operating system................................18 Memory....................................
  • Page 4 Recommended tools................................. 33 Screw list.....................................34 Major components of OptiPlex Tower Plus 7020..................... 35 Chapter 5: Removing and installing side cover................37 Removing the side cover..............................37 Installing the side cover..............................38 Chapter 6: Removing and installing coin-cell battery..............40 Removing the coin-cell battery............................40 Installing the coin-cell battery............................40...
  • Page 5 Installing the intrusion switch........................... 87 Chapter 8: Removing and installing Field Replaceable Units (FRUs)..........88 Power button..................................88 Removing the power button............................. 88 Installing the power button............................89 Wireless antenna kit................................. 90 Internal antenna module............................90 External SMA antenna module..........................94 Processor fan and heat-sink assembly........................
  • Page 6 Running the SupportAssist Pre-Boot System Performance Check.............. 155 Power-Supply Unit Built-in Self-Test ........................155 System-diagnostic lights..............................155 Recovering the operating system..........................157 Real Time Clock—RTC reset............................157 Backup media and recovery options........................... 158 Wi-Fi power cycle................................158 Chapter 12: Getting help and contacting Dell................159 Contents...

  • Page 7: Chapter 1: Views Of Optiplex Tower Plus 7020

    Views of OptiPlex Tower Plus 7020 Front Figure 1. Front view 1. Slim optical drive (optional) Reads from and writes to CDs and DVDs. 2. Power button with diagnostic LED Press to turn on the system if it is turned off, in sleep state, or in hibernate state.

  • Page 8: Back

    This port does not support video/audio streaming. 9. USB 3.2 Gen 2 (10 Gbps) port Connect devices such as external storage devices and printers. Provides data transfer speeds of up to 10 Gbps. Back Figure 2. Back view Views of OptiPlex Tower Plus 7020...
  • Page 9 Maximum resolution supported up to 5120 x 3200 @ 60 Hz with a Type-C to DisplayPort adapter. 13. Padlock ring Attach a standard padlock to prevent unauthorized access to the interior of your system. 14. Serial port (optional) Connect serial I/O devices. Views of OptiPlex Tower Plus 7020...
  • Page 10 Lock or unlock the side cover to the system chassis. Slide the latch to the unlock position to release the side cover. 16. Service Tag label The Service Tag is a unique alphanumeric identifier that enables Dell service technicians to identify the hardware components in your system and access warranty information.

  • Page 11: Chapter 2: Set Up Your Optiplex Tower Plus 7020

    Set up your OptiPlex Tower Plus 7020 Steps 1. Connect the keyboard and mouse. Figure 3. Connect the keyboard and the mouse 2. Connect to your network using a cable, or connect to a wireless network. Set up your OptiPlex Tower Plus 7020...
  • Page 12 Figure 4. Connect to your network using a cable, or connect to a wireless network 3. Connect the display. Set up your OptiPlex Tower Plus 7020...
  • Page 13 Figure 5. Connect the display 4. Connect the power cable. Set up your OptiPlex Tower Plus 7020...
  • Page 14 Figure 6. Connect the power cable 5. Press the power button. Set up your OptiPlex Tower Plus 7020...
  • Page 15 Follow the on-screen instructions to complete the setup. For more information about installing and configuring Ubuntu, search in the Knowledge Base Resource at www.dell.com/support. For Windows: Follow the on-screen instructions to complete the setup. When setting up, Dell Technologies recommends that you: ● Connect to a network for Windows updates. NOTE: If connecting to a secured wireless network, enter the password for the wireless network access when prompted.
  • Page 16 This software delivers intelligent features that automatically fine-tune your computer for the best possible audio, power, and performance. Get the most out of your Dell device with intelligent, personalized technology from MyDell. Following are the key features of MyDell: ●...

  • Page 17: Chapter 3: Specifications Of Optiplex Tower Plus 7020

    The weight of your computer depends on the ● Maximum: 9.63 kg (21.24 lb) configuration ordered and manufacturing variability. Processor The following table lists the details of the processors that are supported by your OptiPlex Tower Plus 7020. Table 3. Processor  Description Option one Option two...

  • Page 18: Chipset

    Graphics 770 Graphics 770 Graphics Graphics Graphics Graphics Chipset The following table lists the details of the chipset that is supported for your OptiPlex Tower Plus 7020. Table 4. Chipset  Description Values Chipset Intel Q670 Processor ● 14th Gen Intel Core i3 ●...

  • Page 19: Memory

    ● 64 GB: 4 x 16 GB, DDR5, 4000 MT/s, UDIMM, quad- channel ● 128 GB: 4 x 32 GB, DDR5, 3600 MT/s, UDIMM, quad- channel Memory matrix The following table lists the memory configurations supported on your OptiPlex Tower Plus 7020. Table 6. Memory matrix  Configuration Slot UDIMM1...

  • Page 20: External Ports

    128 GB DDR5 32 GB 32 GB 32 GB 32 GB External ports The following table lists the external ports of your OptiPlex Tower Plus 7020. Table 7. External ports  Description Values Network port One RJ45 Ethernet port 10/100/1000 Mbps USB ports ●...

  • Page 21: Internal Slots

    ● One full-height Gen3 PCIe x4 open-end slot ● One full-height Gen3 PCIe x1 slot ● One full-height PCI slot Ethernet The following table lists the wired Ethernet Local Area Network (LAN) specifications of your OptiPlex Tower Plus 7020. Table 9. Ethernet specifications  Description Values...

  • Page 22: Audio

    The version of the Bluetooth wireless card may vary depending on the operating system that is installed on your computer. Audio The following table lists the audio specifications of your OptiPlex Tower Plus 7020. Table 11. Audio specifications  Description Values...

  • Page 23: Storage Matrix

    Three M.2 2230/2280 solid-state drives Two 3.5-inch hard-disk drives Redundant Array of Independent Disks (RAID) For optimal performance when configuring drives as a RAID volume, Dell Technologies recommends drive models that are identical. NOTE: RAID is not supported on Intel Optane configurations.

  • Page 24: Media-Card Reader

    OptiPlex Tower Plus 7020 supports RAID with more than one hard drive configuration. Media-card reader The following table lists the media cards that are supported on your OptiPlex Tower Plus 7020. Table 14. Media-card reader specifications  Description Values Media-card type One optional SD-card 4.0 slot...

  • Page 25: Power Supply Connector

    Storage -40°C to 70°C (-40°F to 158°F) -40°C to 70°C (-40°F to 158°F) Power supply connector The following table lists the Power supply connector specifications of your OptiPlex Tower Plus 7020. Table 16. Power supply connector  Connector type Description 260 W internal power supply unit (PSU), 85% Efficient, 80 Plus ●...

  • Page 26: External Display Support (Gpu-Integrated)

    NOTE: DisplayPort Multi-Stream Transport (MST) allows you to daisy chain monitors that have DisplayPort 1.2 and above ports and MST support. For more information about using DisplayPort Multi-Stream Transport, see www.dell.com/support. GPU—Discrete The following table lists the specifications of the discrete Graphics Processing Unit (GPU) supported by your OptiPlex Tower Plus 7020.

  • Page 27: Video Port Resolution (Gpu-Discrete)

    Video port resolution (GPU—Discrete) The following table lists the video port resolution for your OptiPlex Tower Plus 7020. Table 21. Video port resolution (GPU—Discrete)  Graphics card Video ports Maximum supported resolution NVIDIA GeForce RTX 4060 ● Three DisplayPort 1.4a (HBR2 ●...

  • Page 28: Environmental

    Microsoft 10 Device Guard and Credential Guard (Enterprise SKU) Microsoft Windows Bitlocker Padlock ring SafeBIOS: includes Dell Off-host BIOS Verification, BIOS Resilience, BIOS Recovery, and additional BIOS Controls SafeID including Trusted Platform Module (TPM) 2.0 Self-encrypting storage drives (Opal, FIPS)

  • Page 29: Operating And Storage Environment

    Operating and storage environment This table lists the operating and storage specifications of your OptiPlex Tower Plus 7020. Airborne contaminant level: G1 as defined by ISA-S71.04-1985 Table 26. Computer environment  Description Operating Storage Temperature range 10°C to 35°C (50°F to 95°F) -40°C to 70°C (-40°F to 158°F)

  • Page 30: Chapter 4: Working Inside Your Computer

    You should only perform troubleshooting and repairs as authorized or directed by the Dell technical assistance team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. See the safety instructions that is shipped with the product or at www.dell.com/regulatory_compliance.

  • Page 31: Safety Precautions

    ESD protection is an increasing concern. Due to the increased density of semiconductors used in recent Dell products, the sensitivity to static damage is now higher than in previous Dell products. For this reason, some previously approved methods of handling parts are no longer applicable.

  • Page 32: Esd Field Service Kit

    Always place parts in your hand, on the ESD mat, in the computer, or inside an anti-static bag. ● Transporting Sensitive Components – When transporting ESD sensitive components such as replacement parts or parts to be returned to Dell, it is critical to place these parts in anti-static bags for safe transport. Working inside your computer...

  • Page 33: Transporting Sensitive Components

    It is recommended to always use the traditional wired ESD grounding wrist strap and protective anti-static mat when servicing Dell products. In addition, it is critical to keep sensitive parts separate from all insulator parts while performing service and use anti-static bags for transporting sensitive components.

  • Page 34: Screw List

    ● Phillips screwdriver #0 ● Phillips screwdriver #1 ● Plastic scribe Screw list NOTE: When removing screws from a component, it is recommended to note the screw type, and the quantity of screws, and then place them in a screw storage box. This is to ensure that the correct number of screws and correct screw type is restored when the component is replaced.

  • Page 35: Major Components Of Optiplex Tower Plus 7020

    (optional) System board #6-32 #6-32 Major components of OptiPlex Tower Plus 7020 The following image shows the major components of OptiPlex Tower Plus 7020. Figure 8. Major Components of OptiPlex Tower Plus 7020 1. Side cover Working inside your computer...
  • Page 36 NOTE: Dell Technologies provides a list of components and their part numbers for the original system configuration purchased. These parts are available according to warranty coverages purchased by the customer. Contact your Dell sales representative for purchase options. Working inside your computer...

  • Page 37: Chapter 5: Removing And Installing Side Cover

    Removing and installing side cover Removing the side cover Prerequisites 1. Follow the procedure in Before working inside your computer. NOTE: Ensure that you remove the security cable from the security-cable slot, if applicable. About this task The following images indicate the location of the side cover and provide a visual representation of the removal procedure. Figure 9.

  • Page 38: Installing The Side Cover

    Figure 10. Removing the side cover Steps 1. Slide the release latch downwards to release the side cover from the chassis. 2. Slide the side cover outwards, towards the rear of the computer, and lift the side cover away from the chassis. 3.
  • Page 39 Figure 11. Installing the side cover Steps 1. Place the computer in the upright position. NOTE: This step applies only if you have installed any component other than the front bezel. 2. Align the tabs on the side cover with the slots on the chassis. 3.

  • Page 40: Chapter 6: Removing And Installing Coin-Cell Battery

    Removing and installing coin-cell battery Removing the coin-cell battery WARNING: This computer contains a coin-cell battery and requires trained technicians for handling guidance. CAUTION: Removing the coin-cell battery will clear the CMOS and will reset BIOS settings. Prerequisites 1. Follow the procedure in Before working inside your computer.
  • Page 41 Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following images indicate the location of the coin-cell battery and provide a visual representation of the installation procedure. Figure 13. Installing the coin-cell battery Steps With the positive side (+) facing up, insert the coin-cell battery into the battery socket (RTC) on the system board and snap the battery in place.

  • Page 42: Chapter 7: Removing And Installing Customer Replaceable Units (Crus)

    Removing and installing Customer Replaceable Units (CRUs) The replaceable components in this chapter are Customer Replaceable Units (CRUs). CAUTION: Customers can replace only the Customer Replaceable Units (CRUs) following the safety precautions and replacement procedures. NOTE: The images in this document may differ from your computer depending on the configuration you ordered. Front bezel Removing the front bezel Prerequisites...

  • Page 43: Installing The Front Bezel

    Figure 14. Removing the front bezel Steps 1. Using a plastic scribe, gently pry the tabs sequentially from the top and release the tabs on the front bezel. 2. Rotate the front bezel outward from the chassis and remove the front bezel. Installing the front bezel Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.

  • Page 44: Memory Module

    Figure 15. Installing the front bezel Steps 1. Align the tabs on the front bezel with the slots on the chassis. 2. Rotate the front bezel towards the chassis and snap it in place. Next steps 1. Install the side cover.

  • Page 45: Installing The Memory Module

    Figure 16. Removing the memory module Steps 1. Using your fingertips, carefully spread apart the securing-clips on each end of the memory-module slot (DIMM1, DIMM2, DIMM3 or DIMM4, whichever is applicable) . 2. Hold the memory module near the securing clips, and then gently ease the memory module out of the memory-module slot. CAUTION: To prevent damage to the memory module, hold the memory module by the edges.

  • Page 46: M.2 Solid State Drive

    Figure 17. Installing the memory module Steps 1. Ensure that the memory-module securing clips are in an open position. 2. Align the notch on the memory module with the tab on the memory-module slot (DIMM1, DIMM2, DIMM3 or DIMM4, whichever is applicable) . 3.
  • Page 47 2. Remove the side cover. About this task The following images indicate the location of the M.2 2230 solid-state drive and provide a visual representation of the removal procedure. Figure 18. Removing the M.2 2230 solid-state drive Steps 1. Remove the screw (M2x3.5) that secures the M.2 2230 solid-state drive to the M.2 card slot (M.2 PCIe SSD-0, M.2 PCIe SSD-1 or M.2 PCIe SSD-2, whichever is applicable) on the system board.
  • Page 48 Figure 19. Installing the M.2 2230 solid-state drive Figure 20. Installing the M.2 2230 solid-state drive Steps 1. Remove the standoff nut (M2) from the M.2 slot (2280) and place it on the M.2 slot (2230), at half length, on the system board.

  • Page 49: M.2 2280 Solid-State Drive

    3. At an angle, slide and place the M.2 2230 solid-state drive in the M.2 card slot on the system board. 4. Replace the screw (M2x3.5) to secure the M.2 2230 solid-state drive to the system board. Next steps 1. Install the side cover.
  • Page 50 About this task The following images indicate the location of the M.2 2280 solid-state drive and provide a visual representation of the installation procedure. Figure 22. Installing the M.2 2230 solid-state drive Figure 23. Installing the M.2 2280 solid-state drive Steps 1.

  • Page 51: External Puck Antenna

    NOTE: This step applies only if you are replacing a M.2 2230 solid-state drive with a M.2 2280 solid-state drive. 2. Align the notch on the M.2 2280 solid-state drive with the tab on the M.2 card slot (M.2 PCIe SSD-0, M.2 PCIe SSD-1 or M.2 PCIe SSD-2, whichever is applicable) on the system board.

  • Page 52: Installing The Wireless Card

    Figure 24. Removing the wireless card Steps 1. Remove the screw (M2x3.5) that secures the wireless-card bracket to the system board. 2. Slide and lift the wireless-card bracket off the wireless card. 3. Disconnect the antenna cables from the connectors on the wireless card. 4.
  • Page 53 Figure 25. Installing the wireless card Steps 1. Connect the wireless-antenna cables to the wireless card. Table 28. Antenna-cable color scheme  Connectors on the Antenna-cable color Silkscreen marking wireless card △ (white triangle) Main White MAIN Auxiliary Black ▲ (black triangle) 2.

  • Page 54: Graphics Card

    Graphics Card Removing the graphics card Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the side cover. About this task The following images indicate the location of the graphics card and provide a visual representation of the removal procedure. Figure 26.

  • Page 55: Installing The Graphics Card

    4. Align and slide the PCIe blanking plate in the slot on the chassis. NOTE: Do not perform this step if you are immediately replacing the graphics card with a new PCIe card. 5. Close the PCIe door and press it gently until it clicks in place on the chassis. NOTE: Do not perform this step if you are immediately replacing the graphics card with a new PCIe card.

  • Page 56: Removing The Powered Graphics Card

    Steps 1. Lift the pull tab on the PCIe door outwards to open the PCIe door. 2. Remove the PCIe blanking plate from the slot on the chassis. NOTE: Ensure to keep the PCIe blanking plate safe for future use. 3.
  • Page 57 Figure 28. Removing the powered graphics card Removing and installing Customer Replaceable Units (CRUs)

  • Page 58: Installing The Powered Graphics Card

    Figure 29. Removing the powered graphics card Steps 1. Lift the pull tab on the PCIe door outwards to open the PCIe door. 2. Disconnect the power cable from the connector on the powered graphics card. 3. Push and hold the tab that secures the powered graphics card to the PCIe card connector (SLOT2) on the system board. 4.
  • Page 59 Figure 30. Installing the powered graphics card Removing and installing Customer Replaceable Units (CRUs)

  • Page 60: Media-Card Reader

    Figure 31. Installing the powered graphics card Steps 1. Using a screwdriver, remove the fixed PCIe blanking plate from the chassis. NOTE: This step is applicable only when the powered graphics card is being installed for the first time. NOTE: To remove the fixed PCIe blanking plate, insert a flat-head screwdriver in the hole of the cover, push the blanking plate to release it, and then lift the blanking plate off the chassis.

  • Page 61: Installing The Media-Card Reader

    3. Remove the front bezel. About this task The following images indicate the location of the media-card reader and provide a visual representation of the removal procedure. Figure 32. Removing the media-card reader Steps 1. Remove the screw (M3x3) that secures the media-card reader door to the chassis. 2.
  • Page 62 About this task The following images indicate the location of the media-card reader and provide a visual representation of the installation procedure. Figure 33. Installing the media-card reader Steps 1. Connect the media-card reader to the connector (SD CARD) on the system board. 2.

  • Page 63: Hard Drive

    Hard drive 3.5-inch hard drive Removing the 3.5-inch hard drive Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the side cover. 3. Remove the front bezel. About this task The following images indicate the location of the 3.5-inch hard drive and provide a visual representation of the removal procedure.
  • Page 64 Figure 35. Removing the 3.5-inch hard drive Removing and installing Customer Replaceable Units (CRUs)
  • Page 65 Figure 36. Removing the 3.5-inch hard drive Steps 1. Remove the EMI shield from the front side of the chassis. 2. Remove the data and power cables from the retention clip on the disk-drive cage. 3. Remove the screw (M3) that secures the disk-drive cage to the chassis. 4.
  • Page 66 Figure 37. Installing the 3.5-inch hard drive Removing and installing Customer Replaceable Units (CRUs)
  • Page 67 Figure 38. Installing the 3.5-inch hard drive Removing and installing Customer Replaceable Units (CRUs)
  • Page 68 Figure 39. Installing the 3.5-inch hard drive Steps 1. Align the tabs on the 3.5-inch hard-drive bracket with the slots on the hard drive and place the hard drive in the hard-drive bracket. 2. Snap the hard-drive bracket onto the 3.5-inch hard drive. 3.
  • Page 69 2. Remove the side cover. 3. Remove the front bezel. About this task The following images indicate the location of the secondary 3.5-inch hard drive and provide a visual representation of the removal procedure. Figure 40. Removing the secondary 3.5-inch hard drive Removing and installing Customer Replaceable Units (CRUs)
  • Page 70 Figure 41. Removing the secondary 3.5-inch hard drive Steps 1. Disconnect the data and power cables from the respective connectors on the secondary hard drive. 2. Remove the data and power cables from the retention clips on the secondary hard-drive assembly. 3.
  • Page 71 Figure 42. Installing the secondary 3.5-inch hard drive Figure 43. Installing the secondary 3.5-inch hard drive Steps 1. Align and insert the secondary 3.5-inch hard drive into the hard-drive bracket. Removing and installing Customer Replaceable Units (CRUs)

  • Page 72: Optical Drive

    2. Align the screw holes on the 3.5-inch hard-drive bracket to the holes on the hard drive. 3. Replace the fours screws (#6-32) to secure the secondary 3.5-inch hard-drive to the hard-drive bracket. 4. Align and place the secondary 3.5-inch hard-drive assembly in the hard-drive slot on the chassis. 5.
  • Page 73 Figure 44. Removing the slim optical drive Removing and installing Customer Replaceable Units (CRUs)
  • Page 74 Figure 45. Removing the slim optical drive Removing and installing Customer Replaceable Units (CRUs)

  • Page 75: Installing The Slim Optical Drive

    Figure 46. Removing the slim optical drive Steps 1. Remove the EMI shield from the front side of the chassis. 2. Remove the data and power cables from the retention clip on the disk-drive cage. 3. Remove the screw (M3) that secures the disk-drive cage to the chassis. 4.
  • Page 76 Figure 47. Installing the slim optical drive Removing and installing Customer Replaceable Units (CRUs)
  • Page 77 Figure 48. Installing the slim optical drive Removing and installing Customer Replaceable Units (CRUs)
  • Page 78 Figure 49. Installing the slim optical drive Steps 1. Insert the alignment pins on the slim optical-drive bracket in the slots on the optical drive. 2. Align and slide the slim optical drive in the optical-drive slot on the disk-drive cage. 3.

  • Page 79: Internal Speaker

    Internal speaker Removing the internal speaker Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the side cover. About this task The following images indicate the location of the internal speaker and provide a visual representation of the removal procedure. Figure 50.

  • Page 80: Expansion Card

    Figure 51. Installing the internal speaker Steps 1. Press the tab on the internal speaker, align and slide the internal speaker in the slot on the chassis until it snaps in place. NOTE: Ensure that the internal speaker is secured under the tabs on the chassis. 2.

  • Page 81: Installing The Network Card

    Figure 52. Removing the network card Steps 1. Lift the pull tab on the PCIe door outwards to open the PCIe door. 2. Gently remove the network card from the PCIe card connector (SLOT1) on the system board. 3. Align and slide the PCIe blanking plate in the slot on the chassis. NOTE: Do not perform this step if you are immediately replacing the network card with a new PCIe card.
  • Page 82 About this task The following images indicate the location of the network card and provide a visual representation of the installation procedure. Figure 53. Installing the network card Steps 1. Lift the pull tab on the PCIe door outwards to open the PCIe door. 2.

  • Page 83: Removing The Serial/Parallel Port Card

    Removing the serial/parallel port card Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the side cover. About this task The following images indicate the location of the serial/parallel port card and provide a visual representation of the removal procedure.

  • Page 84: Installing The Serial/Parallel Port Card

    Figure 55. Removing the serial/parallel port card Steps 1. Lift the pull tab on the PCIe door outwards to open the PCIe door. 2. Push and hold the tab that secures the serial/parallel port card to the PCIe card connector (SLOT2) on the system board. 3.
  • Page 85 Figure 56. Installing the serial/parallel port card Figure 57. Installing the serial/parallel port card Steps 1. Lift the pull tab on the PCIe door outwards to open the PCIe door. 2. Remove the PCIe blanking plate from the slot on the chassis. Removing and installing Customer Replaceable Units (CRUs)

  • Page 86: Intrusion Switch

    NOTE: Ensure to keep the PCIe blanking plate safe for future use. 3. Align the notch on the serial/parallel port card with the tab on the PCIe card connector (SLOT2) on the system board. 4. Gently press down on the serial/parallel port card till the tab on the PCIe connector locks in place. 5.

  • Page 87: Installing The Intrusion Switch

    Installing the intrusion switch Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following images indicate the location of the intrusion switch and provide a visual representation of the installation procedure.

  • Page 88: Chapter 8: Removing And Installing Field Replaceable Units (Frus)

    To avoid any potential damage to the component or loss of data, ensure that an authorized service technician replaces the Field Replaceable Units (FRUs). CAUTION: Dell Technologies recommends that this set of repairs, if needed, to be conducted by trained technical repair specialists. CAUTION: As a reminder, your warranty does not cover damages that may occur during FRU repairs that are not authorized by Dell Technologies.

  • Page 89: Installing The Power Button

    Figure 60. Removing the power button Steps 1. Disconnect the power-button cable from the connector (PWR SW) on the system board. 2. Press the release tabs on the power-button head and slide the power-button cable out from the front-side chassis of the computer.

  • Page 90: Wireless Antenna Kit

    Figure 61. Installing the power button Steps 1. Insert the power-button cable in the slot on the chassis from the front-side of the computer, and press the power-button head until it clicks into the place in the chassis. 2. Connect the power-button cable to the connector (PWR SW) on the system board. Next steps 1.
  • Page 91 Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the side cover. 3. Remove the front bezel. 4. Remove the wireless card. About this task The following images indicate the location of the internal antenna module and provide a visual representation of the removal procedure.
  • Page 92 Figure 63. Internal antenna module Steps 1. Gently pull the internal-antenna cable out from the slot on the chassis. 2. Remove the internal-antenna cable from the routing guides on the chassis. 3. Remove the two screws (M3x3) that secure the internal antenna module to the chassis. 4.
  • Page 93 Figure 64. Installing the internal antenna module Removing and installing Field Replaceable Units (FRUs)

  • Page 94: External Sma Antenna Module

    Figure 65. Installing the internal antenna module Steps 1. Peel away the protective tape from the back of the internal antenna module. 2. Insert the tabs on the internal antennas in the slots on the chassis. Table 29. Antenna-cable color scheme  Chassis Label Antenna-cable color ANT-W...
  • Page 95 Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the side cover. 3. Remove the external puck antenna. 4. Remove the wireless card. About this task NOTE: This step applies only to computers shipped with an optional external SMA antenna installed. The following images indicate the location of the external SMA antenna module and provide a visual representation of the removal procedure.
  • Page 96 Figure 67. Removing the external SMA antenna module Steps 1. Open the retention clip and remove the external SMA antenna-module cable from the retention clip on the chassis. 2. Lift the pull tab on the PCIe door outwards to open the PCIe door. 3.
  • Page 97 Figure 68. Installing the external SMA antenna module Figure 69. Installing the external SMA antenna module Removing and installing Field Replaceable Units (FRUs)

  • Page 98: Processor Fan And Heat-Sink Assembly

    Steps 1. Using a screwdriver, remove the fixed PCIe blanking plate from the chassis. NOTE: This step is applicable only when the external SMA antenna module is being installed for the first time. NOTE: To remove the fixed PCIe blanking plate, insert a flat-head screwdriver in the hole of the cover, push the blanking plate to release it, and then lift the blanking plate off the chassis.

  • Page 99: Installing The Processor Fan And Heat-Sink Assembly (For 65 W Processors)

    Figure 70. Removing the processor fan and heat-sink assembly (for 65 W processors) Steps 1. Disconnect the processor fan and heat-sink assembly cable from the connector (FAN CPU) on the system board. 2. In reverse sequential order (4 > 3 > 2 > 1) etched on the system board, loosen the four captive screws that secure the processor fan and heat-sink assembly to the system board.

  • Page 100: Removing The Processor Fan And Heat-Sink Assembly (For 125 W Processors)

    Figure 71. Installing the processor fan and heat-sink assembly (for 65 W processors) Steps 1. Align the screw holes on the processor fan and heat-sink assembly with the screw holes on the system board. 2. Place the processor fan and heat-sink assembly on the processor. 3.

  • Page 101: Installing The Processor Fan And Heat-Sink Assembly (For 125 W Processors)

    About this task WARNING: The processor fan and heat-sink assembly may become hot during normal operation. Allow sufficient time for the processor fan and heat-sink assembly to cool before you touch it. CAUTION: For maximum cooling of the processor, do not touch the heat transfer areas on the processor fan and heat-sink assembly.

  • Page 102: Power-Supply Unit

    About this task NOTE: If either the processor or the heat sink is replaced, use the thermal grease that is provided in the kit to ensure that thermal conductivity is achieved. The following images indicate the location of the processor fan and heat-sink assembly and provide a visual representation of the installation procedure.
  • Page 103 Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the side cover. 3. Remove the processor fan and heat-sink assembly (for 125 W processors). NOTE: This procedure applies only to computers shipped with 125 W processors. About this task The following images indicate the location of the power-supply unit and provide a visual representation of the removal procedure.

  • Page 104: Installing The Power-Supply Unit

    Figure 75. Removing the power-supply unit Steps 1. Disconnect the power-supply unit cables from the connectors (ATX CPU1, ATX CPU2, and ATX SYS) on the system board. 2. Open the retention clips that secure the power-supply unit cables to the chassis. 3.
  • Page 105 Figure 76. Installing the power-supply unit Removing and installing Field Replaceable Units (FRUs)

  • Page 106: System Fan

    Figure 77. Installing the power-supply unit Steps 1. Place the power-supply unit near the slot on the chassis and slide it towards the back of the chassis. 2. Align the screw holes on the power-supply unit with the screw holes on the chassis. 3.

  • Page 107: Installing The System Fan

    Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the side cover. About this task The following images indicate the location of the system fan and provide a visual representation of the removal procedure. Figure 78. Removing the system fan Steps 1.
  • Page 108 About this task The following images indicate the location of the system fan and provide a visual representation of the installation procedure. Figure 79. Installing the system fan Steps 1. Ensure that the rubber gromments are installed in the computer chassis. NOTE: Align and insert the rubber grommets through the holes on the chassis to install the rubber gromments in the computer chassis.

  • Page 109: Processor

    Processor Removing the processor CAUTION: The information in this removal section is intended for authorized service technicians only. Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the side cover. 3. Remove the processor fan and heat-sink assembly (for 65 W processors) or the processor fan and heat-sink assembly (for 125 W...

  • Page 110: Voltage-Regulator Heat Sink

    Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following images indicate the location of the processor and provide a visual representation of the installation procedure. Figure 81. Installing the processor Steps 1.

  • Page 111: Installing The Voltage-Regulator Heat Sink

    NOTE: This procedure applies only to computers shipped with 125 W processors installed. About this task WARNING: The voltage-regulator heat sink may become hot during normal operation. Allow sufficient time for the voltage-regulator heat sink to cool before you touch it. CAUTION: For maximum cooling of the processor, do not touch the heat transfer areas on the voltage-regulator heat sink.

  • Page 112: Optional I/O Modules

    Figure 83. Installing the voltage-regulator heat sink Steps 1. Align the screw holes on the voltage-regulator heat sinks to the screw holes on the system board. 2. Tighten the four captive screws to secure the voltage-regulator heat sinks to the system board. Next steps 1.
  • Page 113 Figure 84. Removing the optional serial module Steps 1. Remove the two screws (M3) that secure the optional serial module to the chassis. 2. Disconnect the optional serial module cable from the connector (KB MS SERIAL) on the system board. 3.

  • Page 114: Optional Ps2 And Serial Module

    Figure 85. Installing the optional serial module Steps 1. Using a screwdriver, remove the optional-module cover from the chassis. NOTE: This step is applicable only when the optional serial module is being installed for the first time. NOTE: To remove the optional-module cover, insert a flat-head screwdriver in the hole of the cover, push the cover to release it, and then lift the cover off the chassis.
  • Page 115 2. Remove the side cover. About this task The following images indicate the location of the PS2 and serial module and provide a visual representation of the removal procedure. Figure 86. Removing the optional PS2 and serial module Steps 1. Lift the pull tab on the PCIe door outwards to open the PCIe door. 2.
  • Page 116 Installing the optional PS2 and serial module Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following images indicate the location of the PS2 and serial module and provide a visual representation of the installation procedure.

  • Page 117: Optional Hdmi Module

    5. Connect the PS2 and serial module cable to the connector (KB MS SERIAL) on the system board. 6. Close the PCIe door and press it gently until it clicks in place on the chassis, to secure the PS2 and serial module. Next steps 1.
  • Page 118 Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following images indicate the location of the optional HDMI module and provide a visual representation of the installation procedure. Figure 89. Installing the optional HDMI module Steps 1.

  • Page 119: Optional Displayport Module

    Optional DisplayPort module Removing the optional DisplayPort module CAUTION: The information in this removal section is intended for authorized service technicians only. Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the side cover. About this task The following images indicate the location of the optional DisplayPort module and provide a visual representation of the removal procedure.

  • Page 120: Optional Vga Module

    Figure 91. Installing the optional DisplayPort module Steps 1. Using a screwdriver, remove the optional-module cover from the chassis. NOTE: This step is applicable only when the optional DisplayPort module is being installed for the first time. NOTE: To remove the optional-module cover, insert a flat-head screwdriver in the hole of the cover, push the cover to release it, and then lift the cover off the chassis.
  • Page 121 Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the side cover. About this task The following images indicate the location of the optional VGA module and provide a visual representation of the removal procedure. Figure 92. Removing the optional VGA module Steps 1.

  • Page 122: Optional Usb Type-C Module

    Figure 93. Installing the optional VGA module Steps 1. Using a screwdriver, remove the optional-module cover from the chassis. NOTE: This step is applicable only when the optional VGA module is being installed for the first time. NOTE: To remove the optional-module cover, insert a flat-head screwdriver in the hole of the cover, push the cover to release it, and then lift the cover off the chassis.
  • Page 123 Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the side cover. About this task The following images indicate the location of the optional USB Type-C module and provide a visual representation of the removal procedure. Figure 94.

  • Page 124: System Board

    Figure 95. Installing the optional USB Type-C module Steps 1. Using a screwdriver, remove the optional-module cover from the chassis. NOTE: This step is applicable only when the optional USB Type-C module is being installed for the first time. NOTE: To remove the optional-module cover, insert a flat-head screwdriver in the hole of the cover, push the cover to release it, and then lift the cover off the chassis.
  • Page 125 Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the side cover. 3. Remove the front bezel. 4. Remove the memory module. 5. Remove the M.2 2230 solid-state drive or the M.2 2280 solid-state drive, whichever is applicable. 6.
  • Page 126 Figure 96. System board connectors 1. Power-supply unit cable connector (ATX CPU1) 2. Power-supply unit cable connector (ATX CPU2) 3. Memory module connectors (DIMM3, DIMM1, DIMM4, DIMM2) 4. Power-button cable connector (PWR SW) 5. Media-card reader connector (SD CARD) 6. M.2 2230/2280 solid-state drive connector (M.2 PCIe SSD-1) 7.
  • Page 127 Figure 97. Removing the system board Steps 1. Remove the screw (#6-32) that secures the front I/O-bracket to the chassis. 2. Slide and remove the front I/O-bracket from the chassis. 3. Disconnect the following cables from the respective connectors on the system board and remove them from the retention clips on the chassis, if applicable: a.
  • Page 128 Figure 98. Removing the system board 4. Lift the pull tab on the PCIe door outwards to open the PCIe door. 5. Remove the seven screws (#6-32) that secure the system board to the chassis. 6. Remove the two M.2 solid-state drive standoff nuts (M2) that secure the system board to the chassis. Removing and installing Field Replaceable Units (FRUs)
  • Page 129 Figure 99. Removing the system board 7. Lift the system board at an angle and remove the system board from the chassis. Figure 100. Removing the system board Removing and installing Field Replaceable Units (FRUs)

  • Page 130: Installing The System Board

    Installing the system board CAUTION: The information in this installation section is intended for authorized service technicians only. Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task NOTE: The Service Tag of your computer is stored in the system board. You must enter the Service Tag in the BIOS setup program after you replace the system board.
  • Page 131 13. Power-supply unit cable connector (ATX SYS) 14. Internal-speaker cable connector (INT SPKR) 15. Coin-cell battery connector (RTC) 16. Thunderbolt card connector (TBT) 17. PCIe x4 card connector (SLOT4) 18. PCI card connector (SLOT3) 19. PCIe x16 card connector (SLOT2) 20.
  • Page 132 Figure 103. Installing the system board 4. Connect the following cables to the respective connectors on the system board and route them through the retention clips on the chassis, if applicable: a. Power-supply unit cables (ATX CPU1, ATX CPU2 and ATX SYS) b.
  • Page 133 Figure 104. Installing the system board 5. Close the PCIe door and press it gently until it clicks in place on the chassis. 6. Align the tabs on the front I/O-bracket with the slots on the chassis. 7. Replace the screw (#6-32) to secure the front I/O-bracket to the chassis. Figure 105.
  • Page 134 6. Install the external SMA antenna module, if applicable. 7. Install the power button. 8. Install the expansion card, if applicable. 9. Install the 3.5-inch hard drive or the secondary 3.5-inch hard drive, whichever is applicable. 10. Install the media-card reader, if applicable.

  • Page 135: Chapter 9: Software

    ● Windows 11 Pro ● Windows 11 Pro National Education ● Ubuntu Linux 22.04 LTS Drivers and downloads When troubleshooting, downloading, or installing drivers, it is recommended that you read the Dell Knowledge Base article Drivers and Downloads FAQs 000123347. Software...

  • Page 136: Chapter 10: Bios Setup

    BIOS Setup CAUTION: Unless you are an expert computer user, do not change the settings in the BIOS Setup. Certain changes can make your computer work incorrectly. NOTE: Depending on the computer and its installed devices, the items that are listed in this section may or may not be displayed.

  • Page 137: System Setup Options

    Depending on your computer and its installed devices, the items that are listed in this section may or may not be displayed. Table 31. System setup options—Overview menu  Overview OptiPlex Tower Plus 7020 BIOS Version Displays the BIOS version number. Service Tag Displays the Service Tag of the computer.
  • Page 138 The computer stops booting to the operating system when a component is not authenticated during the boot process. Secure Boot can be enabled in BIOS setup or using management interfaces like Dell Command|Configure, but can only be disabled from BIOS setup.
  • Page 139 Enables the computer to boot using only validated boot software. By default, the Enable Secure Boot option is disabled. For additional security, Dell Technologies recommends keeping the Secure Boot option enabled to ensure that the UEFI firmware validates the operating system during the boot process.
  • Page 140 Table 33. System setup options—Integrated Devices menu (continued) Integrated Devices By default, the Enable Intenal Speaker option is enabled. USB Configuration Enable Front USB Ports Enables the front USB ports. By default, the Enable Front USB Ports option is enabled. Enable Rear USB Ports Enables the rear USB ports.
  • Page 141 Table 34. System setup options—Storage menu (continued) Storage Secure Digital (SD) Card Read-Only Mode Enables or disables the SD card read-only mode. By default, the Secure Digital (SD) Card Read-Only Mode option is disabled. Table 35. System setup options—Display menu  Display Primary Display Determines the primary display when multiple controllers are available on the computer...
  • Page 142 Allows you to select whether or not the TPM is visible to the operating system. By default, the TPM 2.0 Security On option is enabled. For additional security, Dell Technologies recommends keeping TPM 2.0 Security On enabled to allow these security technologies to fully function.
  • Page 143 BIOS. This option returns to the disabled state when the computer restarts. By default, the Clear option is disabled. Dell Technologies recommends enabling the Clear option only when TPM data is required to be cleared. Physical Presence Interface (PPI) Bypass By default, the PPI Bypass for Clear Commands option is disabled.
  • Page 144 By default, the Start Data Wipe option is disabled. Absolute Absolute Software provides various cyber security solutions, some requiring software preloaded on Dell computers and integrated into the BIOS. To use these features, you must enable the Absolute BIOS setting and contact Absolute for configuration and activation.
  • Page 145 BIOS passwords. You can modify the minimum and maximum length of the passwords and require passwords to contain certain character classes (upper case, lower case, digit, special character). Dell Technologies recommends setting the minimum password length to at least eight characters. Upper Case Letter The Upper Case Letter field enforces stricter rules for administrator and system passwords.
  • Page 146 This gives an administrator control over the BIOS settings but enables an end user to provide their own password. By default, the Allow Non-Admin Password Changes option is enabled. For additional security, Dell Technologies recommends keeping the Allow Non- Admin Password Changes option disabled. Admin Setup Lockout...
  • Page 147 Allows you to control the automatic boot flow for SupportAssist System Resolution Console and for Dell operating system Recovery Tool. By default, the Dell Auto OS Recovery Threshold value is set to 2. Table 41. System setup options—System Management menu ...
  • Page 148 Table 41. System setup options—System Management menu (continued) System Management By default, the Wake on LAN/WLAN option is disabled. Auto On Time Enable to set the computer to turn on automatically every day or on a preselected date and time. This option can be configured only if the Auto On Time is set to Everyday, Weekdays, or Selected Days.
  • Page 149 ● Intel Virtualization Technology - X ● Intel Virtualization Technology - Direct By default, the Intel Trusted Execution Technology (TXT) option is enabled. For additional security, Dell Technologies recommends keeping the Intel Trusted Execution Technology (TXT) option enabled. DMA Protection...
  • Page 150 Table 44. System setup options—Virtualization menu (continued) Virtualization Support NOTE: This option is provided only for compatibility purposes, since some older hardware is not DMA capable. Table 45. System setup options—Performance menu  Performance Multi-Core Support Multiple Atom Cores Enables to change the number of Atom cores available to the operating system. The default value is set to the maximum number of cores.

  • Page 151: Updating The Bios

    Updating the BIOS in Windows to download the latest BIOS setup program file. 2. Create a bootable USB drive. For more information, search in the Knowledge Base Resource at www.dell.com/support. 3. Copy the BIOS setup program file to the bootable USB drive.

  • Page 152: Updating The Bios From The F12 One-Time Boot Menu

    One-Time boot menu on the computer. Most of the Dell computers built after 2012 have this capability, and you can confirm by booting your computer to the F12 One-Time Boot Menu to see if BIOS FLASH UPDATE is listed as a boot option for your computer. If the option is listed, then the BIOS supports this BIOS update option.

  • Page 153: Assigning A System Setup Password

    CAUTION: The password features provide a basic level of security for the data on your computer. CAUTION: Anyone can access the data that is stored on your computer, when not locked and left unattended. NOTE: System and setup password feature is disabled. Assigning a System Setup password Prerequisites You can assign a new System or Admin Password only when the status is in Not Set.

  • Page 154: Clearing Cmos Settings

    Clearing BIOS (System Setup) and System passwords About this task To clear the system or BIOS passwords, contact Dell technical support as described at www.dell.com/contactdell. NOTE: For information about how to reset Windows or application passwords, see the documentation accompanying Windows or your application.

  • Page 155: Chapter 11: Troubleshooting

    Check diagnostics About this task SupportAssist diagnostics (also known as system diagnostics) performs a complete check of your hardware. The Dell SupportAssist Pre-boot System Performance Check diagnostics is embedded with the BIOS and launched by the BIOS internally. The embedded system diagnostics provides options for particular devices or device groups allowing you to: ●...
  • Page 156 You should only perform troubleshooting and repairs as authorized or directed by the Dell technical assistance team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Table 48. Diagnostic-light LED codes ...

  • Page 157: Recovering The Operating System

    It enables you to diagnose hardware issues, repair your computer, back up your files, or restore your computer to its factory state. You can also download it from the Dell Support website to troubleshoot and fix your computer when it fails to boot into their primary operating system due to software or hardware failures.

  • Page 158: Backup Media And Recovery Options

    Backup media and recovery options It is recommended to create a recovery drive to troubleshoot and fix problems that may occur with Windows. Dell proposes multiple options for recovering the Windows operating system on your Dell computer. For more information, see...

  • Page 159: Chapter 12: Getting Help And Contacting Dell

    Getting help and contacting Dell Self-help resources You can get information and help on Dell products and services using these self-help resources: Table 49. Self-help resources  Self-help resources Resource location Information about Dell products and services www.dell.com Tips Contact Support In Windows search, type Contact Support, and press Enter.

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