Procedure; Postrequisites - Dell Inspiron M421R Owner's Manual

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WARNING: Before working inside your computer, read the safety information
that shipped with your computer and follow the steps in "Before You Begin" on
page 8. For additional safety best practices information, see the Regulatory
Compliance Homepage at dell.com/regulatory_compliance.

Procedure

NOTE: If you install a new processor, a new thermal cooling assembly including an
affixed thermal pad or a new thermal pad along with documentation to illustrate
proper installation is shipped.
1 Align the pin-1 corner of the processor module with the pin-1 corner of the ZIF
socket, then insert the processor module.
NOTE: The pin-1 corner of the processor module has a triangle that aligns
with the triangle on the pin-1 corner of the ZIF socket.
When the processor module is properly seated, all four corners are aligned at the
same height. If one or more corners of the module are higher than the others, the
module is not seated properly.
CAUTION: To avoid damage to the processor, hold the screwdriver
perpendicular to the processor when turning the cam screw.
2 Tighten the ZIF socket by turning the cam screw clockwise to secure the processor
module to the system board.

Postrequisites

1 Replace the processor heat-sink assembly. See "Replacing the Processor Heat-Sink"
on page 106.
2 Follow the instructions from step 4 to step 7 in "Replacing the System Board" on
page 102.
3
Replace the fan. See "Replacing the Fan" on page 64.
4 Replace the speakers. See "Replacing the Speakers" on page 68.
5 Follow the instructions from step 5 to step 8 in "Replacing the Hard Drive" on
page 38.
6 Follow the instructions from step 4 to step 5 in "Replacing the Optical Drive" on
page 42.
7
Replace the memory module(s). See "Replacing the Memory Module(s)" on page 32.
8 Replace the palm rest. See "Replacing the Palm Rest" on page 48.
9 Replace the keyboard. See "Replacing the Keyboard" on page 24.
10 Replace the base cover. See "Replacing the Base Cover" on page 28.
Replacing the Processor
Replacing the Processor
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