Replacing The Battery - Lenovo ThinkCentre M72e Hardware Maintenance Manual

5. Install the new card into the appropriate card slot on the system board. Then, install the screw to secure
the new PCI card in place. See "Locating parts on the system board" on page 73.
Figure 62. Installing the PCI card
6. To complete the installation or replacement, go to "Completing the parts replacement" on page 156.

Replacing the battery

Attention:
Do not open your computer or attempt any repair before reading and understanding the "Important safety information"
on page 1.
Your computer has a special type of memory that maintains the date, time, and settings for built-in features,
such as parallel-port 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 and Warranty Guide for information about
replacing and disposing of the battery.
To replace the battery, do the following:
1. Remove all 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 120.
3. Locate the battery. See "Locating parts on the system board" on page 80.
4. Remove any parts and disconnect any cables that might prevent your access to the battery.
5. Remove the old battery.
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ThinkCentre Hardware Maintenance Manual