Solving Display Problems - HP Z230 Maintenance And Service Manual

Solving display problems

These suggestions apply to monitors connected to desktop and tower configurations, and to external
monitors connected to all-in-one configurations.
Problem
Blank screen (no video).
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 two-second pause, and then the
computer beeps 6 times.
Monitor does not function when
used with Energy Saver features.
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 8
beeps).
Fixed-sync monitor does not
sync at the resolution
specified.
Computer is in Hibernate
mode.
Workstation monitor settings
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
Solution
Verify the cable connections from the monitor to the
computer and to a working electrical outlet.
Turn the monitor on (LED is on). You might need to refer
to the monitor manual for an explanation of LED signals.
Press a key or the mouse button and, if set, enter your
password.
Reflash the ROM using a SoftPaq.
Verify that the monitor can accept the same horizontal
scan rate as the resolution specified.
Press the power button to resume from Hibernate mode.
1. When you see Press f8 in the bottom-right corner of
the screen, restart the computer and press
startup.
2. Using the keyboard arrow keys, select Enable VGA
Mode, and then press enter.
3. For Windows, double-click the Display icon in the
Control Panel and then select the Settings tab.
4. Use the sliding control to reset the resolution.
1. For Windows, restart your computer 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 about changing
display settings.
For systems with a graphics card:
1. Reseat the graphics card.
2. If the card requires external power, make sure the
power cable is properly connected.
3. Replace the graphics card.
4. Replace the system board.
For systems with no graphics card installed, the CPU
may have no integrated graphics capability.
Disable the monitor Energy Saver feature.
Troubleshooting scenarios and solutions
f8 during
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