Lenovo ThinkCentre M710q Hardware Maintenance Manual page 83

Your computer has a special type of memory that maintains the date, time, and settings for built-in features,
such as parallel connector assignments (configurations). A coin-cell battery keeps this information active
when you turn off the computer.
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 27.
2. Remove the storage drive. See "Replacing the storage drive" on page 28.
3. Remove the internal speaker. See "Replacing the internal speaker" on page 30.
4. Remove the system fan. See "Replacing the system fan" on page 31.
5. Replace the coin-cell battery.
Figure 66. Pressing the metallic tab
Figure 67. Removing the coin-cell battery
.
Chapter 6 Replacing hardware
49