Replace A Cru; Computer Cover - Lenovo ThinkCentre M90t User Manual

• Secondary storage drive*
• Secondary storage drive bracket*
• Secondary storage drive cage*
• Storage drive converter*
• Smart cable clip*
Optional-service CRUs
• Coin-cell battery
• E-lock*
• Power supply assembly
* for selected models

Replace a CRU

Follow the replacement procedure to replace a CRU.

Computer cover

Prerequisite
Before you start, read Appendix A "Important safety information" on page 85 and print the following
instructions.
Before you open the computer 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 all power cords from electrical outlets and disconnect all cables from the computer.
3. Unlock any locking device that secures the computer cover.
4. Lay down the computer with the computer cover facing up.
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M90t User Guide