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  4. Disassembly and Assembly Procedures

4.1 Disassembly Procedures:

Necessary repair and test equipment:
1.  Philips-head screwdriver

S3

S2

S1

S1

Remove the monitor stand base: 

1. Place the monitor on a soft cloth or cushion.

2. Press and hold the stand-release button. 

3. Lift the stand up and away from the monitor. 

S6

S4

S5

Wedge your fingers between the rear cover and the 

middle bezel on the corners of the top side of the 

monitor to release the rear cover, then use one hand 

to press the middle bezel, the other hand to pull up 

carefully the rear cover in order of arrow preference  

for unlocking mechanisms of rear cover.

Use a Philips-head screwdriver to remove four 

screws for unlocking mechanisms. 

(No.1~4 screw size=M4x8; Torque=10~11kgfxcm)

2

3

4

1

4

3

2

3

1

Lift the rear cover up carefully. Disconnect the 

function key cable and LED cable from the 

connectors of the interface board, and then remove 

the rear cover.

Put the rear cover on a protective cushion. Tear off 

the shading tape, then release the diffusion sheet 

from the hook of the rear cover. Use a Philips-head 

screwdriver to remove 4pcs screws for unlocking the 

function key board with the rear cover. Tear off 2pcs 

tapes for releasing the function key cable, then 

release the function key board from the hook of the 

rear cover. 

(No.1~4 screw size=M2x0.2, Torque=0.8

±

0.2

kgfxcm)

Tear off 1pcs aluminum foil for uncovering the LVDS 

connector and cables, then tear off the tapes to 

disconnect the panel cable away from the connector 

of the panel module. Disconnect the power key cable 

and touch key cable from the connectors of the 

interface board.

1

3

4

2

Summary of Contents for S2722DGM

Page 1: ...ipment 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 awa...

Page 2: ...2 Exploded view diagram with list of items ...

Page 3: ...3 Wiring Connectivity Diagram AC Input HDMI1 HDMI2 DP IN Headphone Out LED Driver Panel 2560 1440 LED Board Touch Board Joystic Board Power key Board Interface board Power board ...

Page 4: ...4 screw size M4x8 Torque 10 11kgfxcm 2 3 4 1 4 3 2 3 1 Lift the rear cover up carefully Disconnect the function key cable and LED cable from the connectors of the interface board and then remove the rear cover Put the rear cover on a protective cushion Tear off the shading tape then release the diffusion sheet from the hook of the rear cover Use a Philips head screwdriver to remove 4pcs screws for...

Page 5: ...tear off the tape for releasing the touch key board away from the middle bezel Tear off the black PVC tape and use a Philips head screwdriver to remove 1pcs screw for unlocking the power key board with the front bezel No 1 Screw size M2x2 4 Torque 0 8 0 2kgfxcm 1 Lift up the panel module and pull out the front bezel for releasing the front bezel U se a Philips head screwdriver to remove 4pcs screw...

Page 6: ... then Use a Philips head screwdriver to remove screws for unlocking power board and interface board and then release the panel lamp cable from the hook of the bracket 6pcs No 1 screw size M4x8 Torque 6 0 5kgfxcm No 2 7 screw size M3x7 5 Torque 6 0 5kgfxcm Turn over the bracket chassis module Remove the Mylar from the hooks of the bracket 3 4 2 1 5 6 ...

Page 7: ...o tighten 6pcs screws for locking the circuit board then locate the panel lamp cable into the hook of the bracket No 1 screw size M4x8 Torque 7 0 5kgfxcm No 2 6 screw size M3x7 5 Torque 7 0 5kgfxcm Panel preparation Take out 1pcs panel module from the carton then remove the protective film by tearing off the tapes and then examine the panel surface according to inspection criteria Turn over the pa...

Page 8: ...ddle bezel with power key board and touch key board with the front bezel and panel unit S11 S12 Adjust the bracket chassis module and then u se a Philips head screwdriver to tighten 4pcs screws for locking the bracket chassis module with the panel No 1 4 Screw size M3x0 5x2 8 Torque 5 6kgfxcm 1 S13 Fix the power key cable by tear off 2pcs tape papers on the back of the cable Use a Philips head scr...

Page 9: ... on a cushion foam for later assembling Take 1pcs diffusion sheet plug 1pcs LED cable to the connector of the diffusion sheet S16 Move the assembled rear cover with function key board close to the assembled unit then connect function key cable and LED cable to the connectors of the board Put down the rear cover and push the rear cover for mechanisms engagement Tear off the tape paper on the back o...

Page 10: ...front bezel with panel module then provide power supply and a video signal to the monitor then turn on the monitor for functionality check Use a Philips head screwdriver to tighten 4pcs screws for locking the rear cover with the assembled unit Paste 2pcs labels on the specific positions No 1 4 screw size M4x10 Torque 9 0 5kgfxcm S21 S20 2 3 4 1 Take 1pcs base assemble the base with the stand then ...

Page 11: ...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 S2722DGM The display will go into Standby Mode in 4 minutes www dell com S2722DGM No DP Cable Dell 27 Gaming Monitor or S2722DGM No HDMI 1 Cable Dell 27 Gaming Monitor 1 The display will go into Standby Mode in 4 minutes www dell com S2722DGM or S2...

Page 12: ...nitor then goes into the self test mode 3 Press and hold Button 5 for 4 seconds system will pop OSD message select and press Button 1 A gray screen appears 4 Carefully inspect the screen for abnormalities 5 Move joystick Button 1 to right The color of the screen changes to red 6 Inspect the display for any abnormalities 7 Repeat steps 5 and 6 to inspect the display in green blue black white and te...

Page 13: ...ia 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 spots Cycle power on off Pixel that is permanently off is a natural defect that can occur in LCD technology For more information on Dell Monitor Quality and Pixe...

Page 14: ... self test Ensure that the video cable connecting the monitor to the computer is connected properly and is secure Check for bent or broken pins in the video cable connector Wrong Color Picture color not good Try different Preset Modes in Color settings OSD Adjust R G B value in Custom Color in Color settings OSD Change the Input Color Format to RGB or YCbCr in the Color settings OSD Run the built ...

Page 15: ...or power cable plug it back and then turn on the monitor No Input Signal when user controls are pressed No picture the LED light is white Check the signal source Ensure the computer is not in the power saving mode by moving the mouse or pressing any key on the keyboard Check whether the signal cable is plugged in properly Connect the signal cable again if necessary Reset the computer or video play...

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