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Dell Latitude 3550 Owner's Manual
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Dell Latitude 3550 Owner's Manual

Dell Latitude 3550 Owner's Manual

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Latitude 3550
Owner's Manual
Regulatory Model: P170G
Regulatory Type: P170G002/P170G003
February 2024
Rev. A00

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Summary of Contents for Dell Latitude 3550

  • Page 1 Latitude 3550 Owner's Manual Regulatory Model: P170G Regulatory Type: P170G002/P170G003 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: Set up your Latitude 3550.................... 7 Chapter 2: Views of Latitude 3550....................9 Right....................................... 9 Left......................................9 Top......................................10 Front...................................... 11 Bottom....................................12 Service Tag..................................12 Battery charge and status light .............................13 Chapter 3: Specifications of Latitude 3550.................. 14 Dimensions and weight..............................14 Processor.....................................
  • Page 4 Transporting sensitive components........................32 After working inside your computer........................32 BitLocker..................................32 Recommended tools................................. 32 Screw list.....................................33 Major components of Latitude 3550..........................34 Chapter 5: Removing and installing Customer Replaceable Units (CRUs)........37 Base cover...................................37 Removing the base cover............................37 Installing the base cover............................39 Memory module.................................
  • Page 5 Installing the fan................................64 Touchpad.................................... 65 Removing the touchpad.............................65 Installing the touchpad............................... 67 I/O board.....................................68 Removing the I/O board............................68 Installing the I/O board.............................. 69 Power-button board................................71 Removing the power button............................71 Installing the power button............................71 System board..................................72 Removing the system board............................. 72 Installing the system board............................
  • Page 6 Chapter 9: Troubleshooting....................... 122 Handling swollen rechargeable Li-ion batteries......................122 Locate the Service Tag or Express Service Code of your Dell computer ............122 Dell SupportAssist Pre-boot System Performance Check diagnostics.............. 123 Running the SupportAssist Pre-Boot System Performance Check.............. 123 Built-in self-test (BIST)..............................123...

  • Page 7: Chapter 1: Set Up Your Latitude 3550

    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 8 SupportAssist proactively checks the health of your computer hardware and software. When an issue is detected, the necessary system state information is sent to Dell to begin troubleshooting. SupportAssist is preinstalled on most of the Dell devices running Windows operating system. For more information, see SupportAssist for Business PCs manuals at www.dell.com/support/home/...

  • Page 9: Chapter 2: Views Of Latitude 3550

    Views of Latitude 3550 Right Figure 2. Right view 1. SIM-card slot (optional) Insert a SIM card to connect to a mobile broadband network. 2. USB 3.2 Gen 1 port Connect to external storage devices. Provides data transfer speeds up to 5 Gbps.

  • Page 10: Top

    USB4 is backward compatible with USB 3.2 and USB 2.0. 6. Universal audio port Connect audio-output devices such as speakers, amplifiers, and so on. Figure 4. Image: Top view 1. Power button with optional fingerprint reader Views of Latitude 3550...

  • Page 11: Front

    Slide the privacy shutter to the left to access the camera lens. 4. Camera Enables you to video chat, capture photos, and record videos. 5. Camera-status light Turns on when the camera is in use. 6. Right microphone Views of Latitude 3550...

  • Page 12: Bottom

    The Service Tag is a unique alphanumeric identifier that enables Dell service technicians to identify the hardware components in your computer and access warranty information. Service Tag The service tag is a unique alphanumeric identifier that allows Dell service technicians to identify the hardware components in your computer and access warranty information. Views of Latitude 3550...

  • Page 13: Battery Charge And Status Light

    Figure 7. Image: Service Tag location Battery charge and status light The following table lists the battery charge and status light behavior of your Latitude 3550. Table 2. Battery charge and status light behavior  Power source LED behavior System power state...

  • Page 14: Chapter 3: Specifications Of Latitude 3550

    The weight of your computer depends on the configuration that is ordered and manufacturing variability. Processor The following table lists the details of the processors that are supported for your Latitude 3550 . Table 4. Processor  Description Option one Option two...

  • Page 15: Chipset

    Chipset The following table lists the details of the chipset that is supported for your Latitude 3550. Table 5. Chipset  Description Option one Option two Processors Generation Intel Core i3/i5/i7 Intel Core Ultra 5/Ultra 7 Chipset Intel RPL-U (integrated with the...

  • Page 16: External Ports

    ● 32 GB: 2 x 16 GB, DDR5, 5600 MT/s, dual-channel ● 64 GB: 2 x 32 GB, DDR5, 5600 MT/s, dual-channel External ports The following table lists the external ports of your Latitude 3550. Table 7. External ports  Description...

  • Page 17: Ethernet

    Values Model number RTL8111H-CG Transfer rate 10/100/1000 Mbps Wireless module The following table lists the Wireless Local Area Network (WLAN) modules that are supported on your Latitude 3550. Table 10. Wireless module specifications  Description Option one Option two Model number...

  • Page 18: Audio

    For instructions on how to find your computer's IMEI (International Mobile Station Equipment Identity) number, search in the Knowledge Base Resource at www.dell.com/support. Audio The following table lists the audio specifications of your Latitude 3550. Table 12. Audio specifications  Description...

  • Page 19: Storage

    Up to 1 TB M.2 2230 Class 35 TLC SSD PCIe NVMe Gen4 Up to 1 TB Keyboard The following table lists the keyboard specifications of your Latitude 3550. Table 14. Keyboard specifications  Description Values Keyboard type ● Standard AI hotkey backlit keyboard without fingerprint reader ●...

  • Page 20: Keyboard Shortcuts Of Latitude 3550

    Copilot key launches Windows Search. For more information about Copilot in Windows, search in the Knowledge Base Resource at www.dell.com/support. Keyboard shortcuts of Latitude 3550 NOTE: Keyboard characters may differ depending on the keyboard language configuration. Keys used for shortcuts remain the same across all language configurations.
  • Page 21 Open application menu Fn + Esc Toggle Fn-key lock Fn + PgUp Page up Fn + PgDn Page down Fn + Home Home Fn + End Fn + Right Ctrl Shortcut/Secondary menu assigned to right Ctrl key Specifications of Latitude 3550...

  • Page 22: Camera

    The key sequence will call unobtrusive mode. The hotkey sequence will be disabled by default to prevent accidental actuation. You may enable through BIOS setup option. Camera The following table lists the camera specifications of your Latitude 3550. Table 17. Camera specifications  Description Values...

  • Page 23: Power Adapter

    For more information about touchpad gestures available on Windows, see the Microsoft Knowledge Base article at support.microsoft.com. Power adapter The following table lists the power adapter specifications of your Latitude 3550. Table 19. Power adapter specifications  Description Option one Option two...

  • Page 24: Battery

    Battery The following table lists the battery specifications of your Latitude 3550. Table 20. Battery specifications  Description Option one Option two Option three Option four Battery type 3-cell, 42 3-cell, 54 3-cell, 42 Wh, 3-cell, 54 Wh, Wh, ExpressCharge, Wh, ExpressCharge,...

  • Page 25: Display

    Option four CAUTION: Dell recommends that you charge the battery regularly for optimal power consumption. If your battery charge is completely depleted, connect the power adapter, turn on your computer, and then restart your computer to reduce the power consumption.

  • Page 26: Fingerprint Reader

    Table 23. Sensor  Sensor support Adaptive Thermal Performance-Applicable only for discrete graphics GPU—Integrated The following table lists the specifications of the integrated Graphics Processing Unit (GPU) supported by your Latitude 3550. Table 24. GPU—Integrated  Controller External display support Memory size...

  • Page 27: Gpu-Discrete

    GPU—Discrete The following table lists the specifications of the discrete Graphics Processing Unit (GPU) supported by your Latitude 3550. Table 25. GPU—Discrete  Controller Memory size Memory type Nvidia GeForce MX570A 2 GB GDDR6 Multiple display support matrix The following table lists the multiple display support matrix for your Latitude 3550.
  • Page 28 Operating and storage temperature ranges may differ among components, so operating or storing the device outside these ranges may impact the performance of specific components. * Measured using a random vibration spectrum that simulates the user environment. † Measured using a 2 ms half-sine pulse. Specifications of Latitude 3550...

  • Page 29: 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 30: Safety Precautions

    Ensure that your computer is shut down and the AC adapter is disconnected. a. Hold the <B> key on the keyboard and press the power button for 3 seconds or until the Dell logo appears on the screen. b. Press any key to continue.

  • Page 31: Esd Field Service Kit

    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. Two recognized types of ESD damage are catastrophic and intermittent failures.

  • Page 32: 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 33: Screw List

    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 34: Major Components Of Latitude 3550

    The following image shows the major components of Latitude 3550. NOTE: Dell 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.
  • Page 35 Figure 8. Exploded view 1. Base cover 2. I/O board 3. Memory modules 4. DC-in port cable 5. Bracket 6. System board 7. Touchpad cable 8. Wireless Card 9. Battery 10. Speaker 11. Palm-rest and keyboard assembly Working inside your computer...
  • Page 36 12. Display assembly 13. Touchpad 14. Coin cell battery 15. WLAN card 16. M.2 2230 solid state drive 17. I/O board cable 18. I/O board 19. Fan 20. Power button 21. Heat sink Working inside your computer...

  • Page 37: Chapter 5: 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. Base cover Removing the base cover Prerequisites...
  • Page 38 Figure 9. Removing the base cover Removing and installing Customer Replaceable Units (CRUs)

  • Page 39: Installing The Base Cover

    Steps 1. Loosen the nine captive screws that secure the base cover to the chassis. 2. Using a plastic scribe, pry open the base cover starting from the recesses, which are located in the U-shaped indents at the bottom edge of the base cover, near the hinges. 3.

  • Page 40: Memory Module

    Figure 11. Installing the base cover Steps 1. Place the base cover on top of the chassis. 2. Align the screw holes on the base cover with the screw holes on the palm-rest and keyboard assembly, and snap the base cover latches into place.

  • Page 41: Installing The Memory Modules

    About this task The following images indicate the location of the memory module and provide a visual representation of the removal procedure. Figure 12. Removing the memory module Steps 1. Pry the clips securing the memory module until the memory module pops-up. 2.

  • Page 42: Wireless Card

    Figure 13. Installing the memory modules Steps 1. Align the notch on the memory module with the tab on the memory module slot. 2. Slide the memory module firmly into the slot at an angle. 3. Press the memory module down until it clicks into place. NOTE: If you do not hear the click, remove the memory module and reinstall it.

  • Page 43: Installing The Wireless Card

    Figure 14. Removing the wireless card Steps 1. Remove the screw (M2x3) that secures wireless-card bracket to the system board. 2. Slide and remove the wireless-card bracket from the system. 3. Disconnect the WLAN-antenna cables from the respective connectors on the wireless card. 4.
  • Page 44 About this task Figure 15. Installing the wireless card Steps 1. Connect the WLAN-antenna cables to the respective connectors on the wireless card. NOTE: The WLAN-antenna cable connectors are fragile, and utmost care should be taken while replacing them. Table 30. WLAN-antenna cable color scheme  Connectors on the wireless card Antenna-cable color Main - White triangle (△) on the wireless module of the...

  • Page 45: Wireless Wide Area Network (Wwan) Card

    6. Replace the screw (M2x3) to secure the wireless-card bracket and the wireless card to the system board. Next steps 1. Install the base cover. 2. Follow the procedure in After working inside your computer. Wireless Wide Area Network (WWAN) card Removing the WWAN card Prerequisites 1.

  • Page 46: Coin-Cell Battery

    About this task The figure indicates the location of the WWAN card and provides a visual representation of the installation procedure. Figure 17. Installing the WWAN card Steps 1. Align the notch on the WWAN card with the tab on the WWAN-card slot and insert the WWAN card at an angle into the WWAN-card slot.

  • Page 47: Installing The Coin-Cell Battery

    Figure 18. Removing the coin-cell battery Steps 1. Disconnect the coin-cell battery cable from the connector on the system board. 2. Using a plastic scribe, pry the coin-cell battery off its slot on the palm-rest and keyboard assembly. Installing the coin-cell battery Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.

  • Page 48: Speakers

    Figure 19. Installing the coin-cell battery Steps 1. Align and place the coin-cell battery into its slot on the palm-rest and keyboard assembly. 2. Connect the coin-cell battery cable to the connector on the system board. Next steps 1. Install the base cover.

  • Page 49: Installing The Speakers

    Figure 20. Removing the speakers Steps 1. Disconnect the speaker cable from the connector on the system board. 2. Unroute the speaker cable from the routing guides on the palm-rest and keyboard assembly. 3. Remove the speakers from the palm-rest keyboard and assembly. Installing the speakers Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.
  • Page 50 Figure 21. Installing the speakers Steps 1. Using the alignment posts and rubber grommets, place the speakers in their slots on the palm-rest and keyboard assembly. 2. Route the speaker cables through the routing guides on the palm-rest and keyboard assembly. 3.

  • Page 51: M.2 Solid State Drive

    M.2 solid state drive Removing the M.2 2230 solid-state drive Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. About this task NOTE: This procedure applies only to systems shipped with a M.2 2230 solid-state drive installed. NOTE: The M.2 solid-state drive that is installed on your system depends on the configuration ordered.

  • Page 52: Installing The M.2 2230 Solid-State Drive

    Steps 1. Remove the screw (M2x2) to secures the M.2 2230 solid-state drive holder to the system board. 2. Lift the M.2 2230 solid-state drive holder off the palm-rest and keyboard assembly. 3. Flip the M.2 2230 solid-state drive holder and remove the single screw (M2x2) that secure the M.2 2230 solid-state drive to the M.2 2230 solid-state drive holder.

  • Page 53: Chapter 6: Removing And Installing Field Replaceable Units (Frus)

    ● If the battery gets stuck inside your computer as a result of swelling, do not try to release it as puncturing, bending, or crushing a rechargeable Li-ion battery can be dangerous. In such an instance, contact Dell technical support for assistance. See www.dell.com/contactdell.
  • Page 54 About this task The following images indicate the location of the battery and provide a visual representation of the removal procedure. Figure 24. Removing the battery Steps 1. Use the pull tab to disconnect the battery cable from the connector on the system board. 2.

  • Page 55: Installing The Battery

    Installing the battery 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 battery and provide a visual representation of the installation procedure. Steps 1.

  • Page 56: Installing The Battery Cable

    Figure 25. Removing the battery cable Steps 1. Unroute the battery cable from the routing guides on the battery. 2. Disconnect the battery cable from the connector on the battery. 3. Lift the battery cable away from the battery. Installing the battery cable Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.

  • Page 57: Power-Adapter Port

    Figure 26. Installing the battery cable Steps 1. Connect the battery cable to the connector on the battery. 2. Route the battery cable through the routing guides on the battery. Next steps 1. Install the battery. 2. Install the base cover.

  • Page 58: Installing The Power-Adapter Port

    About this task The following images indicate the location of the power-adapter port and provide a visual representation of the removal procedure. Figure 27. Removing the power-adapter port Steps 1. Remove the three screws (M2.5x5) that secure the right display hinge to the system. 2.

  • Page 59: Heat Sink

    Figure 28. Installing the power-adapter port Steps 1. Align and place the power-adapter port on the system board. 2. Connect the power-adapter port cable to the connector on the system board. 3. Gently press the right display hinge in downward direction towards the system. 4.

  • Page 60: Installing The Heat-Sink For Integrated Graphics

    Figure 29. Removing the heat-sink for integrated graphics Steps 1. Loosen the four captive screws that secure the heat-sink to the system board in the reverse sequential order mentioned on the heat-sink [4 > 3 > 2 > 1]. 2. Lift and remove the heat-sink from the system board. Installing the heat-sink for integrated graphics Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.

  • Page 61: Removing The Heat-Sink For Discrete Graphics

    Figure 30. Installing the heat-sink for integrated graphics Steps 1. Place the heat-sink into its slot on the system board. 2. Align the screw holes on the heat-sink to the screw holes on the system board in the sequential order mentioned on the heat-sink [1 >...

  • Page 62: Installing The Heat-Sink For Discrete Graphics

    Figure 31. Removing the heat-sink for discrete graphics Steps 1. Loosen the seven captive screws that secure the heat-sink to the system board in the reverse sequential order mentioned on the thermal heat-sink [7 > 6 > 5 > 4 > 3 > 2 > 1]. 2.

  • Page 63: Fan

    Figure 32. Installing the heat-sink for discrete graphics Steps 1. Place the heat-sink into its slot on the system board. 2. Align the screw holes on the heat-sink to the screw holes on the system board in the sequential order mentioned on the heat-sink [1 >...

  • Page 64: Installing The Fan

    Figure 33. Removing the fan Steps 1. Disconnect the thermal-fan cable from the connector on the system board. 2. Un route the WLAN antenna cables from the routing guides 3. Remove the two screws (M2x3) that secure the thermal fan to the system board. 4.

  • Page 65: Touchpad

    Figure 34. Installing the fan Steps 1. Place and align the screw holes on the fan with the screw holes on to the system board. 2. Replace the two screws (M2x3) to secure the thermal fan to the system board. 3.
  • Page 66 2. Remove the base cover. 3. Remove the battery. About this task The following images indicate the location of the touchpad and provide a visual representation of the removal procedure. Figure 35. Removing the touchpad Steps 1. Open the latch and disconnect the touchpad cable from the connector on the system board. 2.

  • Page 67: Installing The Touchpad

    Installing the touchpad 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 touchpad and provide a visual representation of the installation procedure. Figure 36.

  • Page 68: I/O Board

    Next steps 1. Install the battery. 2. Install the base cover. 3. Follow the procedure in After working inside your computer. I/O board Removing the I/O board Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover.

  • Page 69: Installing The I/O Board

    CAUTION: The system has a coin-cell battery that is connected to the I/O board. Disconnecting the I/O board cable resets the BIOS setup program settings to default. Note the BIOS setup program settings before disconnecting the I/O board cable. Steps 1.
  • Page 70 Figure 38. Installing the I/O board CAUTION: The system has a coin-cell battery that is connected to the I/O board. Disconnecting the I/O board cable resets the BIOS setup program settings to default. Note the BIOS setup program settings before disconnecting the I/O board cable.

  • Page 71: Power-Button Board

    9. Replace the three screws (M2.5x5) to secure the left display hinge to the system. Next steps 1. Install the base cover. 2. Follow the procedure in After working inside your computer. Power-button board Removing the power button Prerequisites 1. Follow the procedure in Before working inside your computer.

  • Page 72: System Board

    About this task The following images indicate the location of the power button and provide a visual representation of the installation procedure. Figure 40. Installing the power button Steps 1. Align the screw holes on the power button to the screw holes on the palm-rest and keyboard assembly. 2.
  • Page 73 Figure 41. System-board connectors - front 1. Display-cable connector 2. DC-in port connector 3. Speaker-cable connector 4. Touchpad-cable connector 5. Memory-module-connectors 6. Battery-cable connector 7. WLAN-card connector 8. M.2 solid-state drive connector 9. I/O-board cable connector 10. Fan-cable connector Figure 42. System-board connectors - back 1.
  • Page 74 CAUTION: The system has a coin-cell battery that is connected to the I/O board. Disconnecting the I/O board cable resets the BIOS setup program settings to default. Note the BIOS setup program settings before disconnecting the I/O board cable. Steps 1.

  • Page 75: Installing The System Board

    2. Remove the two screws (M2x5) that secure the USB type-C bracket to the system board. 3. Disconnect the following cables from the respective connectors on the system board: ● Touchpad cable ● I/O board cable ● Speaker cable ● Fan cable ●...
  • Page 76 Figure 45. Installing the system board CAUTION: The system has a coin-cell battery that is connected to the I/O board. Disconnecting the I/O board cable resets the BIOS setup program settings to default. Note the BIOS setup program settings before disconnecting the I/O board cable.

  • Page 77: Palm-Rest And Keyboard Assembly

    Steps 1. Connect the WWAN FPC cable to its connector and flip the system board. 2. Align the screw holes on the system board with the screw holes on the palm-rest and keyboard assembly. 3. Replace the four screws (M2x3) to secure the system board to the palm-rest and keyboard assembly. 4.

  • Page 78: Installing The Palm-Rest And Keyboard Assembly

    Figure 46. Removing the palm-rest and keyboard assembly Installing the palm-rest and keyboard assembly Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following image shows the palm-rest and keyboard assembly. Removing and installing Field Replaceable Units (FRUs)
  • Page 79 Figure 47. Installing the palm-rest and keyboard assembly Steps Place the palm-rest and keyboard assembly on a flat surface. Next steps 1. Install the power-adapter port. 2. Install the system board. Removing and installing Field Replaceable Units (FRUs)

  • Page 80: Display Assembly

    NOTE: The system board can be installed with the thermal heat-sink attached to it in order to simplify the procedure and preserve the thermal bond between the system board and the thermal heat-sink. 3. Install the touchpad. 4. Install the speakers. 5.
  • Page 81 Figure 50. Removing the display assembly Removing and installing Field Replaceable Units (FRUs)

  • Page 82: Installing The Display Assembly

    Steps 1. Place the system on a flat surface such that the palm-rest and keyboard assembly lay flat on the surface. 2. Peel the adhesive tape that secures the display cable and remove antenna cable from routing guides. 3. Open the latch and disconnect the display cable from the connector on the system board. 4.
  • Page 83 Figure 52. Installing the display assembly Steps 1. Place the display assembly on a flat surface. 2. Slide the display assembly at an angle and place the system chassis under the hinges of the display assembly. 3. Gently press down on the display hinges to align the screw holes on the display hinges with the screw holes on the palm-rest and keyboard assembly.

  • Page 84: Display Bezel

    Display bezel Removing the display bezel Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. 3. Remove the display assembly. About this task The following image shows the display bezel and provide a visual representation of the removal procedure. Figure 53.

  • Page 85: Installing The Display Bezel

    Installing the display bezel Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following image indicates the location of the display bezel and provides a visual representation of the installation procedure. Figure 54.

  • Page 86: Display Panel

    Display panel Removing the display panel Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. 3. Remove the display assembly. 4. Remove the display bezel. About this task The following images indicate the location of the display panel and provide a visual representation of the removal procedure. Figure 55.
  • Page 87 Figure 57. Removing the display panel Figure 58. Removing the display panel Removing and installing Field Replaceable Units (FRUs)
  • Page 88 Figure 59. Removing the display panel Figure 60. Removing the display panel Removing and installing Field Replaceable Units (FRUs)

  • Page 89: Installing The Display Panel

    Steps NOTE: The display panel is preassembled with the display brackets as a single service part. Do not pull the Stretch Release (SR) tapes and separate the brackets from the display panel. 1. Remove the six (M2.5x2.5) screws that secures the left and right hinges to the display back cover. NOTE: While removing the display panel, disengage the display panel tabs from the display cover before flipping it over 2.
  • Page 90 Figure 61. Installing the display panel Removing and installing Field Replaceable Units (FRUs)
  • Page 91 Figure 62. Installing the display panel Figure 63. Installing the display panel Removing and installing Field Replaceable Units (FRUs)
  • Page 92 Figure 64. Installing the display panel Removing and installing Field Replaceable Units (FRUs)
  • Page 93 Figure 65. Installing the display panel Steps 1. Place the display panel on flat and clean surface. 2. Connect the display cable to the connector on the display panel and close the latch. 3. Adhere the conductive tape to secure the display cable to the display panel. 4.

  • Page 94: Camera

    Camera Removing the camera Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. 3. Remove the display assembly. 4. Remove the display bezel. 5. Remove the display panel. About this task The following images indicate the location of the camera and provide a visual representation of the removal procedure. Figure 66.

  • Page 95: Installing The Camera

    2. Lift to remove the camera module from the display back cover. Installing the camera 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 display panel and provides a visual representation of the installation procedure. Figure 67.

  • Page 96: Edp Cable

    3. Install the display assembly. 4. Install the base cover. 5. Follow the procedure in After working inside your computer. eDP cable Removing the eDP cable Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover.

  • Page 97: Installing The Edp Cable

    Installing the eDP cable Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following image indicates the location of the eDP cable and provides a visual representation of the installation procedure. Figure 69.

  • Page 98: Display Back Cover

    Display back cover Removing the display back cover Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. 3. Remove the display assembly. 4. Remove the display bezel. 5. Remove the display panel. 6. Remove the camera. 7.
  • Page 99 About this task The following image indicates the location of the display back cover and provides a visual representation of the installation procedure. Figure 71. Installing the display back cover Steps Place the display back cover on a clean and flat surface. Next steps 1.

  • Page 100: Chapter 7: Software

    Your Latitude 3550 supports the following operating systems: ● Windows 11 Pro ● Windows 11 Home ● Ubuntu 22.04 LTS, 64-bit 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 101: Chapter 8: 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 102: View Advanced 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 32. System setup options—Overview menu  Overview Latitude 3550 BIOS Version Displays the BIOS version number. BIOS Setup...
  • Page 103 Table 32. System setup options—Overview menu (continued) Overview Service Tag Displays the Service Tag of the computer. Asset Tag Displays the Asset Tag of the computer. Manufacture Date Displays the manufacture date of the computer. Ownership Date Displays the ownership date of the computer. Express Service Code Displays the Express Service Code of the computer.
  • Page 104 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 105 Table 33. System setup options—Boot Configuration menu (continued) Boot Configuration Expert Key Management Enable Custom Mode Enables or disables the keys in the PK, KEK, db, and dbx security key databases to be modified. By default, the Enable Custom Mode option is disabled. Custom Mode Key Management Selects the custom values for expert key management.
  • Page 106 Table 35. System setup options—Storage menu  Storage SATA/NVMe Operation SATA/NVMe Operation Sets the operating mode of the integrated SATA hard drive controller. By default, the RAID On option is selected. The storage device is configured for RAID On mode. Storage Interface Displays the information of various onboard drives.
  • Page 107 USB Wake Support Wake on Dell USB-C Dock When enabled, connecting a Dell USB-C Dock wakes the computer from Standby, Hibernate, and Power Off. By default, the Wake on Dell USB-C Dock option is disabled. Block Sleep Enables or disables the computer from entering Sleep (S3) mode in the operating system.
  • Page 108 TPM On Allows you to enable or disable TPM. By default, the TPM On option is enabled. For additional security, Dell Technologies recommends keeping TPM On enabled to allow these security technologies to fully function. Physical Presence Interface (PPI) Bypass...
  • Page 109 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. TPM State Enables or disables the Trusted Platform Module (TPM).
  • Page 110 When set to Disabled, no notification is displayed and no event is logged in the BIOS Events log. By default, the Chassis Intrusion Detection option is enabled. For additional security, Dell Technologies recommends keeping the Chassis Intrusion Detection option enabled. Block Boot Until Cleared Enables or disables the Block Boot Until Cleared option.
  • Page 111 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 112 Password prompt. ● The computer password is not prompted when the computer resumes from standby mode. Dell Technologies recommends using the computer password in situations where it is likely that a computer may be lost or stolen. Hard Drive Password The Hard Drive Password can be set to prevent unauthorized access of the data stored on the hard drive.
  • Page 113 The Recovery Password can be used when a system owner forgets the administrator, system, or hard drive password. You can get an unlock code from Dell Support over the phone after verifying ownership details. The unlock code overrides and removes the existing password.
  • Page 114 Dell Auto OS Recovery Threshold 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. BIOS Setup...
  • Page 115 Table 42. System setup options—System Management menu  System Management Service Tag Displays the Service Tag of the computer. Asset Tag Creates a computer Asset Tag that can be used by an IT administrator to uniquely identify a particular computer. NOTE: Once set in BIOS, the Asset Tag cannot be changed.
  • Page 116 This option is not available when the virtualization setting for IOMMU is disabled (VT-d/AMD Vi). By default, the Enable Pre-Boot DMA Support option is enabled. For additional security, Dell Technologies recommends keeping the Enable Pre- Boot DMA Support option enabled. BIOS Setup...
  • Page 117 Table 45. 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. Enable OS Kernel DMA Support Allows you to control the Kernel DMA protection for both internal and external ports.

  • Page 118: Updating The Bios

    7. After the download is complete, browse the folder where you saved the BIOS update file. 8. Double-click the BIOS update file icon and follow the on-screen instructions. For more information, search in the Knowledge Base Resource at www.dell.com/support. Updating the BIOS in Ubuntu...

  • Page 119: 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 120: System And Setup Password

    6. Click Update BIOS. The computer restarts to flash the BIOS. 7. The computer will restart after the BIOS update is completed. System and setup password Table 48. System and setup password  Password type Description System password Password that you must enter to log in to your system. Setup password Password that you must enter to access and make changes to the BIOS settings of your computer.

  • Page 121: 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 122: Chapter 9: Troubleshooting

    ● Using a non-Dell or incompatible battery may increase the risk of fire or explosion. Replace the battery only with a compatible battery purchased from Dell that is designed to work with your Dell computer. Do not use a battery from other computers with your computer.

  • Page 123: Dell Supportassist Pre-Boot System Performance Check Diagnostics

    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 124: Lcd Power Rail Test (L-Bist)

    LCD Built-in Self-Test (BIST) Dell laptops have a built-in diagnostic tool that helps you determine if the screen abnormality you are experiencing is an inherent problem with the LCD (screen) of the Dell laptop or with the video card (GPU) and computer settings.

  • Page 125: System-Diagnostic Lights

    SupportAssist OS Recovery. Dell SupportAssist OS Recovery is a stand-alone tool that is preinstalled in all Dell computers that are installed with the Windows operating system. It consists of tools to diagnose and troubleshoot issues that may occur before your computer boots to the operating system.

  • Page 126: Real-Time Clock (Rtc Reset)

    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. For more information about the Dell SupportAssist OS Recovery, see Dell SupportAssist OS Recovery User's Guide at www.dell.com/serviceabilitytools.
  • Page 127 6. Install the battery. 7. Install the base cover. 8. Connect the power adapter to your computer. 9. Turn on your computer. NOTE: For more information about performing a hard reset, search in the Knowledge Base Resource at www.dell.com/ support. Troubleshooting...

  • Page 128: Chapter 10: 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 51. 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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