Lenovo THINKCENTRE 6396 - Manual (Page 91)

Replacing the CMOS battery
This procedure describes how to remove and replace the CMOS battery.
If the CMOS battery fails, the date, time, and configuration information (including
passwords) are lost. An error message is displayed when you turn on the
computer.
Important
Refer to“Safety notices (multi-lingual translations)” on page 7 for information
about replacing and disposing of the battery.
CAUTION:
When replacing the lithium battery, use only Part Number 33F8354 or an
equivalent type battery recommended by the manufacturer.
1. Open the computer cover. See “Opening the cover” on page 84.
2. Locate the battery. See “System board locations” on page 83.
3. Remove the old battery.
4. Install the new battery.
5. Close the computer cover, and connect all the cables. See “Completing the FRU
replacement” on page 103.
Note: When the computer is turned on for the first time after battery
replacement, an error message might be displayed. This is normal after
replacing the battery.
6. Use the Setup Utility program to set the date and time and any passwords. See
Chapter 6, “Using the Setup Utility,” on page 49.
Chapter 8. Replacing FRUs 85