Lenovo ThinkCentre 3231 Hardware Maintenance Manual page 129

2. Position the computer cover on the chassis so that the rail guides on the bottom
of the computer cover engage the rails. Then, push the computer cover closed
until it snaps into position.
Figure 36. Replacing the computer cover
3. If the computer cover is secured with thumbscrews, install them.
4. If a computer cover lock is installed, lock the computer cover.
5. Reconnect the external cables and power cords to the computer. See "Locating
connectors on the rear of the computer" on page 85.
6. If you have replaced the system board, you must update (flash) the BIOS. See
"Updating (flashing) BIOS from a disc" on page 746.
7. Some FRU replacements require the configuration to be updated. To update
your configuration, see Chapter 6, "Using the Setup Utility," on page 49.
Chapter 8. Replacing FRUs - Tower computers
123