HP 54620A - To Remove the System Board

To remove the system board
1
Using the T10 TORX driver, remove the eight screws that hold the
system board to the deck.
2
Remove the two screws from the rear-panel interface connector.
3
Disconnect the three ribbon cables and the calibration cable.
4
As you remove the system board, rotate the system board so that the
BNCs clear the front panel.
Replaceable Parts
To remove the system board
186