Lenovo ThinkCentre M920q 10RR User Manual And Hardware Maintenance Manual page 40

The coin-cell battery normally requires no charging or maintenance throughout its life; however, no coin-cell
battery lasts forever. If the coin-cell battery fails, the date, time, and configuration information (including
passwords) are lost. An error message is displayed when you turn on the computer.
1. Remove the computer cover. See "Removing the computer cover" on page 25.
2. Remove the storage drive or PCI Express card. See "Replacing the storage drive" on page 26 or
"Replacing the PCI Express card and PCI Express card adapter" on page 29.
3. Remove the internal speaker if necessary. See "Replacing the internal speaker" on page 31.
4. Remove the system fan. See "Replacing the system fan" on page 33.
5. Replace the coin-cell battery.
Figure 50. Pressing the metallic tab
Figure 51. Removing the coin-cell battery
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M920q User Guide and Hardware Maintenance Manual