Lenovo ThinkCentre M57p Hardware Maintenance Manual - Page 99
Replacing, battery
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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. 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. This procedure describes how to remove and replace the CMOS battery. 1. Remove the cover. See "Removing the cover" on page 89. 2. Locate the battery. See the system board illustration for your machine type at "System board connectors" on page 88. 3. You might have to remove any PCI adapters that impede access to the battery. 4. Remove the old battery. 5. Install the new battery. 6. Replace any PCI adapters that were removed. 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. 7. Go to "Completing the FRU replacement" on page 112. Chapter 8. Replacing FRUs 93