HP Vectra VL800 Troubleshooting Manual page 11

NOTE
Symptom...
Power indicator light and hard
disk activity light work but the
screen remains blank.
If the monitor is still blank
You may need to update the Basic Input Output System (BIOS).
Case 2 — Monitor Is Blank
When the power button is pressed, the PC appears to boot (sounds
can be heard from the hard disk drive and fan, and status LED is
green), but the monitor is blank.
Hard disk drive and fan can be heard.
•
Status LED is GREEN.
•
Press the power button and keep it pressed for about 5 seconds. The
PC will turn off.
Before removing the cover, always switch off the display and PC.
Disconnect the power cord and any accessory cables. When checks
have been completed, close the PC and reconnect the power cord and
accessory cables. Verify that the PC boots correctly.
Check that...
The display is switched ON (LED is on).
The monitor's power cord is correctly
connected.
The monitor's power outlet is working.
Check that...
The monitor's brightness and contrast
settings are correct.
The monitor itself is not faulty.
The video cable pins are not damaged.
1 Your PC Does Not Start Correctly
How...
Refer to the monitor manual for an explanation of the LEDs.
Ensure the power cord is plugged into a grounded power outlet
and into the monitor.
Plug a light into the grounded power outlet and check that it
comes on.
How...
Refer to the monitor manual if necessary.
1 Replace the monitor by a known working monitor from the
same model of PC.
2 If the monitor starts, contact HP Support or your authorized
dealer. The monitor may need to be replaced.
1 Switch off and unplug the monitor.
2 Disconnect the video cable and straighten any bent pins.
3 Reconnect the video cable.
4 Switch on the monitor and see if it works.
The BIOS may be corrupt. Refer to page 33 for instructions on
how to recover the BIOS.
Case 2 — Monitor Is Blank
Continued on the next page
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