Dell D2421H Service Manual - Page 6
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4.Mechanical Instruction
DELLE2420H
1 Disassembly Procedures:
S1
Turn off power
S2
Unplug external cables from product
Remove stand from product: press the
S3
release button, then pull out the stand.
use a Philips‐head screwdriver to remove six screws
S4
for unlocking mechanisms.
(No.1~4 screw size=M4x10; Torque=7.5~8.5kgfxcm
No.5~6 screw size=M3x6; Torque=5~6kgfxcm.)
1
Use plastic picks to wedge from Teardown
hole, release rear cover， then pull up
S5
carefully the rear cover in order of arrow
preference for unlocking mechanisms of rear
cover.
Put it on a protective cushion and remove
S6
the rear cover.
6