Heat Sink - Lenovo ThinkCentre M75n Hardware Maintenance Manual

7. Install the internal speaker.
8. Connect the internal speaker cable to the internal speaker connector on the system board. See "System
board" on page 58.
9. Reinstall the removed parts. Then, reconnect the power adapter and all disconnected cables to the
computer.
10. Turn over the computer so that the bottom cover is facing down.

Heat sink

Prerequisite
Before you start, read Chapter 1 "Important safety information" on page 1 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. Turn over the computer so that the bottom cover is facing up.
2. Remove the bottom cover. See "Bottom cover" on page 69.
3. Turn over the computer so that the computer cover is facing up.
4. Remove the computer cover and the rear I/O bracket. See "Computer cover and rear I/O bracket" on
page 73.
5. Remove the internal speaker. See "Internal speaker" on page 77.
6. Remove the system fan. See "System fan" on page 76.
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ThinkCentre M75nHardware Maintenance Manual