Lenovo ThinkCentre M75n User Manual page 58

Before you open the bottom cover, turn off the computer and wait several minutes until the computer is cool.
Replacement procedure
1. Remove any media from the drives and turn off all connected devices and the computer.
2. Disconnect the power cord from the electrical outlet and disconnect all cables from the computer.
3. Unlock any locking device that secures the computer cover.
4. Remove the bracket, if any. See "DIN rail bracket kit" on page 43, "Power adapter bracket kit" on page
45, or "VESA mount bracket kit" on page 49.
5. Turn over the computer so that the bottom cover is facing up.
6. Remove the bottom cover.
7. Install the bottom cover.
8. Turn over the computer so that the bottom cover is facing down.
9. Reinstall the bracket you have removed.
10. If a locking device is available, use it to lock the computer.
52
ThinkCentre M75n User Guide