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4. Position the replacement memory module over the memory connector. Make sure that the notch 1 on
the memory module aligns correctly with the connector key 2 on the system board. Push the memory
module straight down into the memory connector until the retaining clips close.
5. Go to "Completing the FRU replacement" on page 113.
Replacing the CMOS battery
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
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 conguration 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 6 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. Remove the computer cover. See "Removing the cover" on page 94.
98 ThinkCentre Hardware Maintenance Manual