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Product Announcement:
This product is certificated to meet RoHS
Directive and Lead-Free produced definition.
Using approved critical components only is
recommended when the situation to replace
defective parts. Vender assumes no liability
express or implied, arising out of any unauthorized
modification of design or replacing non-RoHS
parts. Service providers assume all liability.
Qualified Repairability:
Proper service and repair is important to the safe,
reliable operation of all series products. The
service providers recommended by vender should
be aware of notices listed in this service manual in
order to minimize the risk of personal injury when
perform service procedures. Furthermore, the
possible existed improper repairing method may
damage equipment or products. It is recommended
that service engineers should have repairing
knowledge, experience, as well as appropriate
product training per new model before performing
the service procedures.
NOTICE:
! To avoid electrical shocks, the products should be
connected to an authorized power cord, and turn
off the master power switch each time before
removing the AC power cord.
! To prevent the product away from water or
expose in extremely high humility environment.
! To ensure the continued reliability of this
product, use only original manufacturer's
specified parts.
! To ensure following safety repairing behavior, put
the replaced part on the components side of
PWBA, not solder side.
1. Important Safety Notice
! To ensure using a proper screwdriver, follow the
! Using Lead-Free solder to well mounted the
! The fusion point of Lead-Free solder requested in
torque and force listed in assembly and
disassembly procedures to unscrew screws.
parts.
the degree of 220°C.
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Summary of Contents for Dell S2721DGFA
- Page 1 1. Important Safety Notice Product Announcement: ! To ensure using a proper screwdriver, follow the This product is certificated to meet RoHS torque and force listed in assembly and Directive and Lead-Free produced definition. disassembly procedures to unscrew screws. Using approved critical components only is ! Using Lead-Free solder to well mounted the recommended when the situation to replace parts.
- Page 2 2. Exploded view diagram with list of items Joystick Stand and Panel Base Joystick OSD key IF and Main Front Frame Power bracket trim...
- Page 3 3. Wiring Connectivity Diagram Panel LED Light Bar Interface Board Power Board AC In DP 1.4 HDMI 2.0 HDMI 2.0 Audio Line Out USB Up-Stream USB Down-Stream USB Down-Stream Function Key Board USB Board Power Key Board...
- Page 4 4. Disassembly and Assembly Procedures Lift the rear cover up carefully. Disconnect the USB Necessary repair and test equipment: 1. Philips-head screwdriver FFC cable, joystick key cable and power key cable from the connectors of the interface board, and then 4.1 Disassembly Procedures: Remove the monitor stand base: disconnect the back LED light bar cable from the...
- Page 5 4. Disassembly and Assembly Procedures Remove the middle bezel and put it into a fixture jip, Tear off all the mylar and tapes, then use a Philips- then use a Philips-head screwdriver to remove 1pcs head screwdriver to remove 7pcs screws for screw for unlocking the power key board with the releasing the diffuser, reflector and LGP.
- Page 6 4. Disassembly and Assembly Procedures Tear off the adhesive tape, and then disconnect the Remove the circuit boards from the bracket EDP cable from the connector of the panel module, chassis module carefully, and then disconnect all then put the bracket chassis on a protective cushion. of the cables.
- Page 7 4. Disassembly and Assembly Procedures 4.2 Assembly Procedures: Panel preparation: Take out 1pcs panel module from Place a bracket chassis base on a protective the carton, remove the protective film by tearing off cushion, then stick 1pcs Silicon sheet on the position the tapes, then Examine the panel surface as the picture below shown.
- Page 8 4. Disassembly and Assembly Procedures Take 1pcs front bezel, lift up the panel module and then assemble the front bezel with the panel module unit. Fix the power key cable by tear off 2pcs tape papers on the back of the cable. Paste 1pcs mylar tape on the specific position of the panel as the picture below Take 1pcs power key board, 1pcs key cable and shown.
- Page 9 4. Disassembly and Assembly Procedures reflector Assemble 1pcs left diffuser mylar and 1pcs right diffuser mylar with the left and right corners as the following picture. Use a Philips-head screwdriver to tighten 7pcs screws for locking the diffuser, reflector and LGP with the rear cover. (No.1~7 screw size=M3x3.5x7, Torque=2~3kgfxcm) Take 1pcs joystick key board, plug key cable to the joystick key board, then locate the joystick key board...
- Page 10 4. Disassembly and Assembly Procedures Move the assembled rear cover close to the Take a stand base close to the monitor. Fit the two panel unit, then connect light bar cable to the tabs on the upper part of the stand into the grooves on connector of the power board, then connect the the back of the monitor, and then lower the stand so power key cable, joystick key cable and USB FFC...
- Page 11 Unplug the video cable from the back of the computer. To ensure proper Self-Test operation, remove all digital and the analog cables from the back of computer. 3. Turn on the monitor. The floating dialog box should appear on-screen (against a black background), if the monitor cannot sense a video signal and is working correctly. While in self-test mode, the power LED remains white. Also, depending upon the selected input, one of the dialogs shown below will continuously scroll through the screen. Dell 27 Gaming Monitor No DP Cable The display will go into Power Save Mode in 4 minutes. www.dell.com/support/S2721DGF S2721DGF Dell 27 Gaming Monitor No HDMI 1 Cable The display will go into Power Save Mode in 4 minutes.
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Page 12: Built-In Diagnostics
5. Trouble Shooting Instructions Built-in diagnostics Your monitor has a built-in diagnostic tool that helps you determine if the screen abnormality you are experiencing is an inherent problem with your monitor, or with your computer and video card. To run the built-in diagnostics: 1. Ensure that the screen is clean (no dust particles on the surface of the screen). 2. Press and hold Button 5 for four seconds until a menu appears on the screen. 3. Using the joystick control, highlight the Diagnostics option and press the joystick button to start the diagnostics. A gray screen is displayed. 4. Observe if the screen has any defects or abnormalities. 5. Toggle the joystick once again until a red screen is displayed. 6. Observe if the screen has any defects or abnormalities. 7. Repeat steps 5 and 6 until the screen displays green, blue, black, and white colors. Note any abnormalities or defects. The test is complete when a text screen is displayed. To exit, toggle the joystick control again. If you do not detect any screen abnormalities upon using the built-in diagnostic tool, the monitor is functioning properly. Check the video card and computer. -
Page 13: Common Problems
No Video/ No picture or no • Increase brightness and contrast controls via Power LED on brightness OSD. • Perform monitor self-test feature check. • Check for bent or broken pins in the video cable connector. • Run the built-in diagnostics. • Ensure that the correct input source is selected in the Input Source menu. Missing Pixels LCD screen has • Cycle power on-off. spots • Pixel that is permanently off is a natural defect that can occur in LCD technology. • For more information on Dell Monitor Quality and Pixel Policy, see Dell Support site at: www.dell.com/pixelguidelines. Stuck-on Pixels LCD screen has • Cycle power On-Off. bright spots • Pixel that is permanently off is a natural defect that can occur in LCD technology. • For more information on Dell Monitor Quality and PixelPolicy, see Dell Support site at: www.dell.com/pixelguidelines. Brightness Picture too dim • Reset the monitor to factory settings. Problems or too bright • Adjust brightness and contrast controls via OSD. Safety Related Visible signs of • Do not perform any troubleshooting steps. - Page 14 5. Trouble Shooting Instructions Common What You Possible Solutions Symptoms Experience Intermittent Monitor • Ensure that the video cable connecting the Problems malfunctions on monitor to the computer is connected properly & off and is secure. • Reset the monitor to factory settings. • Perform monitor self-test feature check to determine if the intermittent problem occurs in self-test mode. HDR Problems Cannot set • Ensure your computer or graphics solution GFX solution meets the minimum requirement for HDR into HDR mode playback and install the latest software drivers after switching for the graphics card. into Desktop/ • Ensure that the HDMI 2.0 cable that comes with Movie HDR/ the package is used. Game HDR/ • If the above steps fail, choose the resolution DisplayHDR 2560 x 1440 from the Display Properties to force Presets the proper HDR signaling.
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Page 15: Product Specific Problems
5. Trouble Shooting Instructions Product specific problems Problem What you Possible solutions experience Screen image is Image is • Check the Aspect Ratio setting in the Display too small centered on menu OSD. screen, but • Reset the monitor to factory settings. does not fill entire viewing area Cannot adjust OSD does not • Turn off the monitor, unplug the monitor power the monitor appear on the cable, plug it back, and then turn on the monitor. with the screen buttons on the front panel No Input Signal No picture, the • Check the signal source. Ensure the computer when user LED light is is not in the power saving mode by moving the controls are white mouse or pressing any key on the keyboard. -
Page 16: Universal Serial Bus (Usb) Specific Problems
5. Trouble Shooting Instructions Universal Serial Bus (USB) specific problems Specific What You Possible Solutions Symptoms Experience USB interface is USB peripherals • Check that your display is turned ON. not working are not working • Reconnect the upstream cable to your computer. • Reconnect the USB peripherals (downstream connector). • Turn off the monitor and turn it on again. • Reboot the computer. • Certain USB devices such as portable hard drives require higher power source; connect the drive to the computer directly. SuperSpeed SuperSpeed • Check that your computer is USB 3.0-capable. USB 3.0 USB 3.0 • Some computers have USB 3.0, USB 2.0, and interface is peripherals USB 1.1 ports. Ensure that the correct USB port slow.