HP Z4 Maintenance and Service Guide - Page 63

Solving display problems, ImageControl/ Horizontal Position

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Blank screen and the power LED flashes Red seven times, once every second, followed by a two second pause, and the computer beeps seven times. (Beeps stop after fifth iteration but LEDs continue flashing.) Cause Solution System board failure (ROM detected failure prior to video). Replace the system board. Monitor does not function properly when used with energy saver features. Cause Solution Monitor without energy saver capabilities is being used with energy saver features enabled. Disable monitor energy saver feature. Dim characters. Cause The brightness and contrast controls are not set properly. Solution Adjust the monitor brightness and contrast controls. Blurry video or requested resolution cannot be set. Cause If the graphics controller was upgraded, the correct graphics drivers may not be loaded. Monitor is not capable of displaying requested resolution. Graphics card is bad. Solution Download the latest graphics drivers from hp.com. Change requested resolution. Replace the graphics card. The picture is broken up, rolls, jitters, or flashes. Cause The monitor connections may be incomplete or the monitor may be incorrectly adjusted. Monitor needs to be degaussed. Solution 1. Be sure the monitor cable is securely connected to the computer. 2. In a two-monitor system or if another monitor is in close proximity, be sure the monitors are not interfering with each other's electromagnetic field by moving them apart. 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. Image is not centered. Cause Position may need adjustment. 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. Solving display problems 55

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Blank screen and the power LED
flashes
Red seven times, once every second, followed by a two second pause, and the computer
beeps seven times. (Beeps stop after
fifth
iteration but LEDs continue
flashing.)
Cause
Solution
System board failure (ROM detected failure prior to video).
Replace the system board.
Monitor does not function properly when used with energy saver features.
Cause
Solution
Monitor without energy saver capabilities is being used with
energy saver features enabled.
Disable monitor energy saver feature.
Dim characters.
Cause
Solution
The brightness and contrast controls are not set properly.
Adjust the monitor brightness and contrast controls.
Blurry video or requested resolution cannot be set.
Cause
Solution
If the graphics controller was upgraded, the correct graphics
drivers may not be loaded.
Download the latest graphics drivers from hp.com.
Monitor is not capable of displaying requested resolution.
Change requested resolution.
Graphics card is bad.
Replace the graphics card.
The picture is broken up, rolls, jitters, or
flashes.
Cause
Solution
The monitor connections may be incomplete or the monitor may
be incorrectly adjusted.
1.
Be sure the monitor cable is securely connected to
the computer.
2.
In a two-monitor system or if another monitor is in close
proximity, be sure the monitors are not interfering with each
other’s electromagnetic
field
by moving them apart.
3.
Fluorescent lights or fans may be too close to the monitor.
Monitor needs to be degaussed.
Degauss the monitor. Refer to the documentation that came with
the monitor for instructions.
Image is not centered.
Cause
Solution
Position may need adjustment.
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.
Solving display problems
55