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Compaq Professional Workstation AP550 Maintenance and Service Guide
Display Problems
Table 4-4
Solutions for Display Problems
Problem Possible Solution
Screen is blank. Monitor is not turned on and the monitor light is not
on. Turn on the monitor and check that the monitor
light is on.
Screen save has been initiated. Press any key or
move the mouse to light the screen. Wait a few
seconds for the screen to become active.
Check the cable connection from the monitor to the
workstation and check the grounded AC outlet.
The brightness needs adjusting. Adjust the brightness
control.
The energy saver feature has been enabled. Press
any key or type the password. Wait a few seconds for
the screen to become active.
The RGB (Red, Green, Blue) input switch on the back
of the monitor is incorrectly set. Set the monitor’s
Input switch to 75 ohms. If there is a sync switch, set
it to External.
If a fixed-sync monitor is used, be sure that the
monitor can accept the same sweep rate as the
resolution chosen.
Check that the graphics adapter is fully and properly
inserted in the PCI or AGP Pro slot.
Graphics colors are wrong. If the BNC cable is used, make sure that the Red,
Green, and Blue BNC cables are connected to the
corresponding monitor connectors.
Be sure the monitor’s RGB inputs are set to 75 ohms.
Characters are dim. Adjust the monitor’s brightness and contrast controls.
Check that the video cable is securely connected to
the video card and monitor.
Set the RGB switch (and sync options, if available) to
75 ohms, with the sync set to External. Refer to the
documentation included with the monitor.
Monitor does not function properly when used with
the energy saver features.
A monitor without the energy saver feature is being
used with energy saver features enabled.
Disable the monitor energy saver feature.
Blurry display or requested resolution cannot be set. If the graphics controller was upgraded, the correct
display drivers may not be loaded.
Install the correct display drivers on the diskette
included in the upgrade kit.
continued
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