HP Xw9400 - Workstation - 16 GB RAM Reference Manual page 156

Table 6-7 Display problems (continued)
Problem
The display works properly
during the POST but goes
blank when the OS starts.
Power LED flashes red six
times, once every second,
followed by a two second
pause, and the workstation
beeps six times.
Monitor does not function
properly when used with
energy saver features.
Characters are dim.
Video is blurry or requested
resolution cannot be set.
146 Chapter 6 System diagnostics and troubleshooting
Cause
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.
Solution
1. Restart the workstation and press
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
3. In Windows Control Panel, double-click
the Display icon and click the Settings
tab.
4. Use the available functions to set the
display to the proper values.
5. Refer to your operating system and
graphics card documentation for
information on changing display settings.
CAUTION: Disconnect AC power from the
workstation before reseating or replacing
components because there is power to the
system board even when the workstation is
powered down.
1. Ensure that the auxiliary power cable (if
applicable) is securely connected.
2. Reseat the graphics card.
3. Replace the graphics card.
4. 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.
F8
Enter.
ENWW