HP xw4550 Service And Technical Reference Manual page 117

Table 5-6 Display problems (continued)
Problem
The display works properly during
the POST but goes blank when the
operating system starts.
Power LED flashes red 6 times,
once every second, followed by a
2-second pause, and the
workstation beeps 6 times.
Monitor does not function properly
when used with energy saver
features.
Dim characters.
Blurry video or requested
resolution cannot be set.
The picture is fragmented, rolls,
jitters, or flashes.
ENWW
Cause
Fixed-sync monitor will not
sync at the resolution chosen.
Computer is in Hibernate
mode.
Monitor settings in the
workstation are not compatible
with the monitor.
The display settings in the
operating system are
incompatible with your
graphics card and monitor.
Pre-video graphics error.
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.
Solution
Be sure that the monitor can accept the same horizontal
scan rate as the resolution chosen.
Press the power button to resume from Hibernate mode.
1. Restart the workstation and press
when you see Press F8 in the bottom-right corner of
the screen.
2. Use the keyboard arrow keys to 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 operating system starts, change the display
settings to match those supported by your graphics
card and monitor.
3. Refer to your operating system and graphics card
documentation for information on changing display
settings.
For systems with a graphics card:
1. Reseat the graphics card.
2. Replace the graphics card.
3. Replace the system board.
Disable monitor energy saver feature.
Adjust the monitor brightness and contrast controls.
Verify 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. Ensure the monitor cable is securely connected to the
workstation.
2. In a two-monitor system or if another monitor is in
close proximity, ensure the electromagnetic field of
each monitor is not interfering with the other monitor
by moving them further from each other.
3. Fluorescent lights or fans might be too close to the
monitor.
Customer self help 109
F8 during startup