Dell Inspiron M421R (Late 2012) - Manual (Page 103)

Replacing the System Board | 102
43 Replacing the System Board
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
1 Replace the screws that secure the daughter board to the system board.
2 Replace the processor. See "Replacing the Processor" on page 96.
3 Replace the processor heat-sink. See "Replacing the Processor Heat-Sink" on
page 106.
4 Slide the connectors on the system-board assembly into the slots on
the computer base.
5 Align the screw holes on the system-board assembly with the screw holes on the
computer base.
6 Replace the screws that secure the system-board assembly to the computer base.
7 Connect the power-adapter port cable to the system-board connector.
Postrequisites
1 Replace the fan. See "Replacing the Fan" on page 64.
2 Replace the speakers. See "Replacing the Speakers" on page 68.
3 Follow the instructions from step 5 to step 8 in "Replacing the Hard Drive" on
page 38.
4 Follow the instructions from step 4 to step 5 in "Replacing the Optical Drive" on
page 42.
5 Replace the Mini-Card. See “Replacing the Mini-Card” on page 52.
6 Replace the memory module(s). See "Replacing the Memory Module(s)" on page 32.
7 Replace the palm rest. See "Replacing the Palm Rest" on page 48.
8 Replace the keyboard. See "Replacing the Keyboard" on page 24.
9 Replace the base cover. See "Replacing the Base Cover" on page 28.
10 Replace the battery. See "Replacing the Battery" on page 18.
11 Follow the instructions in "After Working Inside Your Computer" on page 10.
book.book Page 102 Friday, September 7, 2012 10:23 AM