b. Follow the following sequence to loosen the four screws that secure the heat-sink-and-fan assembly
to the system board:
• Partially loosen screw
1
, fully loosen screw
2
, and then fully loosen screw
1
.
• Partially loosen screw
3
, fully loosen screw
4
, and then fully loosen screw
3
.
Note:
Carefully loosen the four screws to avoid any possible damage to the system board. The four
screws cannot be removed from the heat-sink-and-fan assembly.
Figure 105. Removing the heat-sink-and-fan assembly
c. Lift the failing heat-sink-and-fan assembly off the system board.
Notes:
• You might have to gently twist the heat-sink-and-fan assembly to free it from the microprocessor.
• Do not touch the thermal grease while handling the heat-sink-and-fan assembly.
4. To install the heat-sink-and-fan assembly, do the following:
a. Apply appropriate amount of thermal grease to the new heat-sink-and-fan assembly.
b. Position the heat-sink-and-fan assembly on the system board. Ensure that the four screws are
aligned with the holes in the system board.
Note:
Ensure that the heat-sink-and-fan assembly cable is toward the microprocessor fan connector
on the system board.
c. Follow the following sequence to tighten the four screws to secure the new heat-sink-and-fan
assembly. Do not over-tighten the screws.
• Partially tighten screw
1
, fully tighten screw
2
, and then fully tighten screw
1
.
• Partially tighten screw
3
, fully tighten screw
4
, and then fully tighten screw
3
.
88
P330 User Guide
Summary of Contents for ThinkStation P330
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