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1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer stand. See "Removing and installing the computer stand" on page 73.
4. Remove the computer cover. See "Removing the computer cover" on page 76.
5. Remove the system-board shield. See "Removing and installing the system-board shield" on page 86.
6. Follow the sequence
to the system board. Then, remove the screw
the system board.
Notes:
a. Carefully loosen the four screws from the system board to avoid any possible damage to the system
board. The four screws cannot be removed from the heat sink assembly.
b. You might have to gently twist the heat sink assembly to free it from the microprocessor.
c. Do not touch the thermal grease while handling the heat sink assembly.
Figure 36. Removing the heat sink assembly
7. To install the new heat sink assembly, position the new heat sink assembly on the system board so that
the four screws align with the corresponding holes in the system board.
8. Follow the sequence
system board. Then, install the screw
1
,
2
,
3
,
4
as shown to loose the four screws that secure the heat sink assembly
1
,
2
,
3
,
4
to tighten the four screws to secure the heat sink assembly to the
5
to secure the heat sink assembly to the chassis.
5
as shown. Lift the failing heat sink assembly off
.
Chapter 8
Replacing FRUs
101
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Table of Contents
Troubleshooting
