Replacing the CANbus card......................................... 82Procedure................................................................................................82Post-requisites ....................................................................................... 83Removing the coin-cell battery.................................... 84Prerequisites............................................................................................84Procedure............................................................................................... 84Replacing the coin-cell battery.................................... 86Procedure............................................................................................... 86Post-requisites ....................................................................................... 86Removing the intrusion switch..................................... 87Prerequisites............................................................................................87Procedure................................................................................................87Replacing the intrusion switch..................................... 89Procedure............................................................................................... 89Post-requisites ....................................................................................... 89Removing the serial ports............................................ 90Prerequisites........................................................................................... 90Procedure................................................................................................ 91Replacing the serial ports.............................................93Procedure............................................................................................... 93Post-requisites ....................................................................................... 93Removing the bottom cover.........................................94Prerequisites........................................................................................... 94Procedure............................................................................................... 947