HP xw4000 Service & Reference Manual page 167

Display
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.
Service Reference Guide
Possible Solution
1. Monitor is not turned on and the monitor light is not on.
Turn on the monitor and check that the monitor light is
on.
2. Screen save has been initiated. Press any key or move
the mouse to light the screen.
3. The cable connections are not correct. Check the cable
connection from the monitor to the computer and to the
electrical outlet.
4. The brightness need adjusting. Adjust the brightness
control.
5. The energy saver feature has been enabled. Press any
key or click the mouse button and, if one has been set,
type the password.
6. 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 and, if there is a sync switch, set it to
External.
7. System ROM is bad and system is running in FailSafe
Boot Block mode (indicated by one long beep and three
short beeps). Reflash the ROM using a ROMPaq
diskette. Refer to "FailSafe Boot Block ROM" in section
3.4.3 of this book.
8. If a fixed-sync monitor is used, be sure that the monitor
can accept the same sweep rate as the resolution
chosen.
9. Ensure the VGA/BNC selector is properly set.
Either the cabling or the monitor impedance is incorrect.
1. Ensure that the Red, Green, and Blue BNC cables are
connected to the corresponding monitor connectors.
2. Be sure the monitor's RGB inputs are set to 75 ohms.
1. Adjust the monitor's brightness and contrast controls.
2. Check that the video cable is securely connected to the
graphics card and monitor.
3. 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 without the energy saver feature is being used with
energy saver features enabled. Disable the monitor energy
saver features.
If the graphics controller was upgraded, the correct display
drivers may not be loaded. Install the correct display drivers
from the diskette included in the upgrade kit.
Troubleshooting Without Diagnostics
F–5