Dell Precision T3600 (Mid 2012) - Manual (Page 20)

Installing the Coin-Cell Battery
1. Place the coin-cell battery into the slot on the system board.
2. Press the coin-cell battery downward until the release latch springs back into place and secures it.
3. Install the cover.
4. Follow the procedures in After Working Inside Your Computer .
Removing the Heat Sink
1. Follow the procedures in Before Working Inside Your Computer .
2. Remove the cover.
3. Disconnect the heat-sink cable from the system board.
4. Loosen the screws that secure the heat sink.
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