Lenovo ThinkStation P340, User Manual

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Heat-sink-and-fan assembly
Prerequisite
Before you start, read Appendix B “Important safety information” on page 109 and print the following
instructions.
The heat sink might be very hot. Before you open the computer cover, turn off the computer and wait several
minutes until the computer is cool.
Replacement procedure
1. Remove the computer cover. See “Computer cover” on page 46.
2. Remove the optical drive. See “Optical drive” on page 47.
3. Remove the front bezel. See “Front bezel” on page 51.
4. Remove the optical drive cage. See “Optical drive cage” on page 73.
5. Disconnect the heat-sink-and-fan assembly cable from the microprocessor fan connector on the system
board.
6. Depending on the computer models, the heat-sink-and-fan assembly might vary. To replace the heat-
sink-and-fan assembly:
• Type-1:
a. Follow the following sequence to loosen the four screws that secure the heat-sink-and-fan
assembly to the system board. Then, lift the heat-sink-and-fan assembly off the system board.
– Partially loosen screw 1a , fully loosen screw 1b , and then fully loosen screw 1a .
– Partially loosen screw 1c , fully loosen screw 1d , and then fully loosen screw 1c .
Notes:
– 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.
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P340 User Guide