Dell S2421HS Simplified Service Manual page 4

Necessary repair and test equipment:
1. Philips-head screwdriver
4.1 Disassembly Procedures:
Remove the monitor stand base:
1. Place the monitor on a soft cloth or cushion.
S1
2. Press and hold the stand-release button.
3. Lift the stand up and away from the monitor.
Use a Philips-head screwdriver to remove 4pcs
S2
screws for unlocking mechanisms.
(No.1~4 screw size=M4x11; Torque=7 8kgfxcm)
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
S3
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.
2
4. Disassembly and Assembly Procedures
~
2
3
1
4
.
1
2
3
Tear off 2pcs aluminum foils, and then disconnect
the function key cable away from the connector of
S4
the board. Disconnect the panel lamp cable and
function key cable away from the connectors of the
panel module and board.
Use a Philips-head screwdriver to remove 16pcs
screws for unlocking the middle bezel.
S5
(No.1~11 screw size=M3x4, Torque=3~4kgfxcm;
No.12~16 screw size=M2x3.3, Torque=1±0.2kgfxcm)
4
2
8
6
10
14
15
Use a Philips-head screwdriver to remove 2pcs
screws for unlocking the bracket chassis with panel
S6
module.
(No.1~2 screw size=M3x3, Torque=3~4kgfxcm )
2
1 3
5
9
7
11
12
16
13
1