HP Pro 3000 SFF Maintenance And Service Manual page 162

Table C-5 Solving Display Problems (continued)
Blank screen and the computer emits one short beep then one long beep followed by a three second pause.
Cause
Pre-video memory error.
Blank screen and the computer emits two short beeps then one long beep followed by a three second pause.
Cause
Pre-video graphics error.
Monitor does not function properly when used with energy saver features.
Cause
Monitor without energy saver capabilities is being used with
energy saver features enabled.
Dim characters.
Cause
The brightness and contrast controls are not set properly.
Cables are not properly connected.
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.
152 Appendix C Troubleshooting Without Diagnostics
Solution
1. Reseat DIMMs. Power on the system.
2. Replace DIMMs one at a time to isolate the faulty
module.
3. Replace third-party memory with HP memory.
4. Replace the system board.
Solution
For systems with a graphics card:
1. Reseat the graphics card. Power on the system.
2. Replace the graphics card.
3. Replace the system board.
For systems with integrated graphics, replace the system
board.
Solution
Disable monitor energy saver feature.
Solution
Adjust the monitor brightness and contrast controls.
Check that the graphics cable is securely connected to the
graphics card and the monitor.
Solution
Install the video drivers included in the upgrade kit.
Change requested resolution.
Replace the graphics card.