DEC VT420 Service Manual page 43

6. Pull the board away from the plastic tab on the connector side of the
terminal board. You can release the tab by inserting a screwdriver
through the hole below the tab.
7. Lift the terminal board out of the base.
To install the terminal board assembly, reverse the installation steps. If
you need to adjust the video display, refer to Chapter 4.
Removing and Replacing FRUs 35
G S F _ 1 4 5 3 _ 8 9 . D G