Dell U4021QW Service Manual page 9

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Tear off 2pcs shading tapes, and then disconnect
S12
the panel lamp cable from the two connectors of the
panel module.
Remove the mylar tape from the hooks of the
S13
bracket .
Use a Philips-head screwdriver to remove
screws for unlocking power board, interface board
S14
and LED driver board.
(No.1 screw size=M4x8, Torque=6
No.2~8 screw size=M3x7.5, Torque=6
8
5
7
5. Disassembly and Assembly Procedures
8pcs
kgfxcm;
±0.5
kgfxcm)
±0.5
3
2
6
1
4
Remove the LED driver board, interface board abd
S15
power board from the
carefully, and then
bracket chassis module
disconnect all of the cables.

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