Data General AViiON 4600 Series, Customer Documentation

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CPU, I/O Expansion, and Graphics Boards
9-17
014–002091
Removing the Graphics or Z–Buffer Board
You will need to remove a graphics board or z-buffer board to replace them or a failing
system board. Before you can remove the graphics board or z-buffer board, you must
remove the computer unit's right side cover and attach the ESD wrist strap as
described in the Opening the Computer Unit" section of Chapter 1.
CAUTION: Unless you are properly grounded, you can discharge static electricity and
damage components in the system.
To remove the graphics or z-buffer boards, follow the steps below. You will need a
medium Phillips screwdriver. If you are installing a graphics controller board, you
might also need a flatĆblade screwdriver and a medium-sized adjustable wrench.
1. If you are removing a graphics controller board, remove the hexagonal retaining
nuts and the washers that secure the monitor connectors to the computer unit
bulkhead, as shown in Figure 9Ć20. If you cannot release the nuts with your
fingers, use an adjustable wrench.
Computer unit (back)
Remove hex nuts
and washers
Figure 9-20 Releasing the Graphics Monitor Connectors from the Computer Bulkhead
2. Remove the board-retaining screws from the board you are removing.
Figure 9Ć21 shows the location of the boardĆretaining screws on the option
boards.