Replacing FRUs

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

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

To replace the coin-cell battery,

1. 1

   Remove any media from the drives and turn off all connected devices and the computer. Then, disconnect all power cords from electrical outlets and disconnect all cables that are connected to the computer.

2. 2

   Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay it down so that the screen is against the surface and the computer cover is facing up.

3. 3

   Remove the computer stand. For details, see Replacing the computer stand.

4. 4

   Remove the computer cover. For details, see Removing the computer cover.

5. 5

   Remove the system board shield. For details, see Replacing the system board shield.

6. 6

   Replace the coin-cell battery.

   
   
   

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7. 7

   Reinstall the removed parts and computer cover, and then reconnect the cables. For details, see Completing the parts replacement.

To dispose of the coin-cell battery, refer to the “Lithium coin-cell battery notice” in the Safety and Warranty Guide.