Lenovo ThinkCentre M90n-1 Hardware Maintenance Manual page 81

8. Remove the coin-cell battery.
9. Install the new coin-cell battery on the new system board.
10. Turn over the system board so that the coin-cell battery is facing down.
11. Route the speaker cable and the antenna cables by the cable clip, and then install the system board.
12. Reinstall all removed parts.
13. Reconnect the external cables and power adapter to the corresponding connectors on the computer,
and then reconnect the power cord to the electrical outlet.
Note: If a locking device is available, use it to lock the computer.
.
Chapter 6 Hardware removal and installation
75