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.
Cables are not properly connected.
Check that the graphics cable is securely connected to the
graphics card (if applicable) or video connector and the monitor.
Blurry video or requested resolution cannot be set.
Cause
Solution
If the graphics controller was upgraded, the correct graphics
drivers may not be loaded.
Install the video drivers included in the upgrade kit.
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.
84
Chapter 6 Troubleshooting without diagnostics
Содержание ProDesk 400 G2 Small Form Factor
Страница 1: ...Maintenance and Service Guide HP ProDesk 400 G2 Small Form Factor ...
Страница 4: ...iv About This Book ...
