Replacing The Cmos Battery - Lenovo ThinkCentre 3656 Hardware Maintenance Manual

Replacing the CMOS battery

This section provides information on how to remove and replace the CMOS
battery.
To remove or replace the CMOS battery, do the following:
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.
CAUTION:
When replacing the lithium battery, use only Part Number 33F8354 or an
equivalent type battery recommended by the manufacturer.
1. Remove the computer cover. See "Removing the cover" on page 117.
2. Locate the battery. See "Locating parts on the system board" on page 119.
3. Remove the old battery.
4. Install the new battery.
5. Replace the computer cover, and connect the cables
6. Turn on the computer and all attached devices.
7. Use the Setup Utility program to set the date and time and any passwords. See
Attention
Do not open your computer or attempt any repair before reading and understanding the
"Important safety information" in the ThinkCentre Safety and Warranty Guide that came with
your computer. To obtain a copy of the ThinkCentre Safety and Warranty Guide, go to:
http://www.lenovo.com/support
Important
Refer to "Safety notices (multi-lingual translations)" on page 7 for information
about replacing and disposing of the battery.
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.
"Using the Setup Utility" in the User Guide
Chapter 9. Replacing FRUs - Rocky computers
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