HP Z8 G4 Maintenance And Service Manual page 67

The picture is broken up, rolls, jitters, or flashes.
Cause
Monitor needs to be degaussed.
Image is not centered.
Cause
Position may need adjustment.
"No Connection, Check Signal Cable" displays on screen.
Cause
Monitor video cable is disconnected.
"Out of Range" displays on screen.
Cause
Video resolution and refresh rate are set higher than what
the monitor supports.
High pitched noise coming from inside a flat panel monitor.
Cause
Brightness and/or contrast settings are too high.
Solution
3. Fluorescent lights or fans may be too close to the monitor.
Degauss the monitor. Refer to the documentation that came with
the monitor for instructions.
Solution
Press the monitor's Menu button to access the OSD menu. Select
ImageControl/ Horizontal Position or Vertical Position to adjust
the horizontal or vertical position of the image.
Solution
Connect the video cable between the monitor and computer.
CAUTION: Ensure that the computer power is off while connecting
the video cable.
Solution
Restart the computer and enter Safe Mode. Change the settings to
a supported setting then restart the computer so that the new
settings take effect.
To enter Safe Mode:
1. Log into the computer using an Administrator account.
2. Type msconfig in the taskbar search box, and then select
msconfig from the list of applications.
3. Click the Boot tab, select Safe boot and then click OK.
Solution
Lower brightness and/or contrast settings.
Solving display problems 59