Lenovo ThinkStation P358 Tower Hardware Maintenance Manual page 84

• 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.
• 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.
2. 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. 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
• Partially tighten screw
Notes:
• Apply appropriate amount of thermal grease to the new heat-sink-and-fan assembly.
• Ensure that the heat-sink-and-fan assembly cable is toward the microprocessor fan connector on the
system board.
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P358 TowerHardware Maintenance Manual
2a , fully tighten screw 2b
2c , fully tighten screw 2d
, and then fully tighten screw
, and then fully tighten screw
2a .
2c .