Solving Display Problems - HP xw4300 Service And Technical Reference Manual

5.7.5

Solving Display Problems

Table 5-7 Display Problems
Problem
Blank screen (no video).
CAUTION: When attempting to resume from Standby mode, do not hold down the power button for more than four seconds.
Otherwise, the workstation will shut down and you will lose your data.
The display works properly during
the POST but goes blank when the
OS starts.
Monitor does not function properly
when used with energy saver
features.
Dim characters.
Blurry video or requested resolution
cannot be set.
The picture is broken up, rolls, jitters,
or flashes.
Vibrating or rattling noise coming
from inside a CRT monitor when
powered on.
Clicking noise coming from inside a
CRT monitor.
Cause
The cable connections are not
correct.
The monitor is off.
Screen blanking utility installed
or energy saver features
enabled.
System ROM is bad; system is
running in FailSafe Boot Block
mode (indicated by eight
beeps).
Computer is in Standby mode.
Monitor settings in the
workstation are not compatible
with the monitor.
The display settings in the OS
are incompatible with your
graphics card and monitor.
Monitor without energy saver
capabilities is being used with
energy saver features enabled.
The brightness and contrast
controls are not set properly.
Cables are not properly
connected.
If the graphics controller was
upgraded, the correct video
drivers might not be loaded.
Monitor is not capable of
displaying requested resolution.
The monitor connections might
be incomplete or the monitor
might be incorrectly adjusted.
Monitor must be degaussed.
Monitor degaussing coil has
been activated.
Electronic relays have been
activated inside the monitor.
Solution
Check the cable connections from the monitor to the
workstation and to a working electrical outlet.
Switch the monitor to on (LED is on). You might need to
refer to the monitor manual for an explanation of the LED
signals.
Press any key or click the mouse button and, if set, enter
your password.
Reflash the ROM using a ROMPaq diskette.
Press the power button to resume from Standby mode.
1. Restart the workstation and press F8 during startup
when you see "Press F8" in the bottom-right corner of
the screen.
2. Using the keyboard arrow keys, select Enable VGA
Mode and press Enter.
3. In Windows Control Panel, double-click the Display
icon and select the Settings tab.
4. Use the sliding control to reset the resolution.
1. Restart your workstation in VGA mode.
2. After the OS starts, change the display settings to
match those supported by your graphics card and
monitor.
3. Refer to your OS and graphics card documentation for
information on changing display settings.
Disable monitor energy saver feature.
Adjust the monitor brightness and contrast controls.
Check that the graphics cable is securely connected to the
graphics card and the monitor.
Install the video drivers included in the upgrade kit.
Change requested resolution.
1. Be sure the monitor cable is securely connected to the
workstation.
2. In a two-monitor system or if another monitor is in close
proximity, be sure the monitors are not interfering with
each other's electromagnetic field by moving them
apart.
3. Fluorescent lights or fans might be too close to the
monitor.
Degauss the monitor.
None. It is normal for the degaussing coil to be activated
when the monitor is powered on.
None. It is normal for some monitors to make a clicking
noise when turned on and off, when going in and out of
Standby mode, and when changing resolutions.
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