Replacing The Battery - Lenovo THINKCENTRE M79 User Manual

Replacing the battery

Attention: Do not open your computer or attempt any repair before reading and understanding the "Read
this first: Important safety information" on page v.
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 battery keeps this information active when you
turn off the computer.
The battery normally requires no charging or maintenance throughout its life; however, no battery lasts
forever. If the 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 battery.
To replace the battery, do the following:
1. Remove any media from the drives and turn off all attached 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 69.
3. Locate the battery. See "Locating parts on the system board" on page 6.
4. Remove the old battery.
Figure 27. Removing the old battery
5. Install a new battery.
Figure 28. Installing a new battery
6. Reinstall the computer cover and connect the cables. See "Completing the parts replacement" on
page 106.
Note: When the computer is turned on for the first time after replacing the battery, an error message
might be displayed. This is normal after replacing the battery.
7. Turn on the computer and all attached devices.
8. Use the Setup Utility program to set the date, time, and any passwords. See "Using the Setup Utility
program" on page 35.
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Chapter 9 Installing or replacing hardware
81