Dell OptiPlex 3000 Thin Client Service Manual page 32

Steps
1. Insert the coin-cell battery into the battery socket with the positive side facing up, and snap the battery into place.
To install the mylar sheet, follow the below mentioned steps:
NOTE: The coin-cell battery has a black mylar for cosmetic purpose only and has no functional impact. During the
installation of a new system board, it is recommended to transfer the black mylar from the previous system board to the
new system board.
2. Use the folding lines on the mylar sheet to fold the mylar sheet.
3. Insert one end of the mylar sheet under the RTC socket.
4. Insert another end of the mylar sheet under another side of the RTC socket.
Next steps
1. Install the side cover.
2. Follow the procedure in
32 Removing and installing components
after working inside your computer.