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CMOS battery removal and installation - ThinkCentre A50, S50

Your computer has a special type of memory that maintains the date, time, and settings for built-in features, such as parallel port assignments (configuration). A battery keeps this information active when you turn off the computer.

The battery normally requires no charging or maintenance throughout its life; however, no battery lasts forever. If the battery fails, the date, time, and configuration information (including passwords) are lost. An error message is displayed when you turn on the computer.

To change the battery

  1. Turn off the computer and disconnect the power cord from the electrical outlet and from the computer.
  2. Disconnect all other cables attached to the computer.
  3. Open the cover. See "Cover removal ".
  4. Refer to "Identifying parts on the system board" and locate the battery.
  5. Remove the PCI riser and PCI adapters that impede access to the battery.
  6. Remove the old battery.

remove the CMOS battery

  1. Install the new battery.

install a CMOS battery

  1. Install the PCI riser and adapters if removed.
  2. Replace the cover, and connect the cables. See "Cover installation and connecting the cables".
    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.
  3. Turn on the computer and all attached devices.
  4. Use the Setup Utility program to set the date and time and any passwords.
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Document ID : PD008653
Legacy Document ID : MIGR-51024
Last Updated :
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