Compaq AP550 Compaq Professional Workstation AP550 Maintenance & Service G - Page 106

Display Problems, Table 4-4, Solutions for Display Problems - professional workstation drivers

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4-12 Compaq Professional Workstation AP550 Maintenance and Service Guide Display Problems Table 4-4 Solutions for Display Problems Problem Screen is blank. Graphics colors are wrong. Characters are dim. Monitor does not function properly when used with the energy saver features. Blurry display or requested resolution cannot be set. Possible Solution 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. 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. 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. A monitor without the energy saver feature is being used with energy saver features enabled. Disable the monitor energy saver feature. 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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4-12
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