Lenovo 10KY Hardware Maintenance Manual page 101

Your computer has a special type of memory that maintains the date, time, and settings for built-in features,
such as parallel-connector assignments (configuration). 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.
Refer to the "Lithium coin-cell battery notice" in the Safety, Warranty, and Setup Guide for information about
replacing and disposing of the coin-cell battery.
To replace the coin-cell battery, do the following:
1. Remove any media from the drives and turn off all connected devices and the computer. Then,
disconnect all power cords from electrical outlets and disconnect all cables that are connected to the
computer.
2. Remove the computer cover. See "Removing the computer cover" on page 82.
3. Remove any parts that might prevent your access to the coin-cell battery. Depending on your computer
model, you might have to remove the optical drive or the storage drive in the optical drive bay. See
"Replacing the optical drive" on page 82 or "Replacing the storage drive" on page 85.
4. Remove the storage drive in the primary storage drive bay. See "Replacing the storage drive" on page 85.
5. Locate the coin-cell battery. See "Computer components" on page 31.
6. Remove the coin-cell battery as shown.
Figure 30. Removing the coin-cell battery
7. Install the new coin-cell battery as shown.
Figure 31. Installing the coin-cell battery
8. Reinstall the storage drive in the primary storage drive bay. See "Replacing the storage drive" on
page 85.
9. Reinstall the optical drive or the storage drive in the optical drive bay if you have removed any of them.
See "Replacing the optical drive" on page 82 or "Replacing the storage drive" on page 85.
10. Reinstall the computer cover and reconnect cables to your computer. See "Completing the parts
replacement" on page 110.
11. Turn on the computer and all connected devices.
.
Chapter 9 Installing or replacing hardware
95