HP 98568A Installation Instruction page 193

HP 98548/49/50A High Resolution Video Boards
c. Loosen the two captive screws securing the processor board. You may
need a Pozidriv screwdriver to loosen them.
d. Slide the processor board out of the backplane and place it on a
static-free surface. The bag which the new video board is packaged in is
a good place.
e. Locate the Display Disable switch (see Figure 5-37).
Display Disable
Position
--~r.
Figure 5-37.
Display Disable Switch
f.
Set the switch to the Display Disable position.
g. If there is a grounding clip on the top edge of the processor board back
plate, remove it.
h. Re-install the processor board in the upper wide backplane slot and
tighten the captive fasteners.
1.
Now continue with step 4 in this Installation Procedure.
3. Follow these steps to install a video board in a computer which either has an
existing video board or does not have video:
Adding Interface Cards 5-97