Replacing The Cmos Battery - Lenovo J100 Hardware Maintenance Manual

Replacing 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.
Refer to "Safety notices (multi-lingual translations)" on page 7 for information
about replacing and disposing of the battery.
1. Turn off the computer and all attached devices.
2. Remove the left-side cover. See "Removing the covers" on page 82.
3. Locate the battery. See "Identifying parts on the system board" on page 85.
4. If necessary, remove any adapters that impede access to the battery. See
5. Remove the old battery.
6. Install the new battery.
7. Replace any adapters that were removed to gain access to the battery. See
8. Go to "Completing the FRU replacement." on page 111.
"Replacing a PCI adapter" on page 90 for more information.
"Replacing a PCI adapter" on page 90 for instructions for replacing adapters.
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.
Chapter 8. Replacing FRUs (Types 8252, 8253, 8254, 8255, 8256, 8257, 8258, and 8259)
91