Compaq 100eu - All-in-One PC Maintenance & Service Manual page 172

"No Connection, Check Signal Cable" displays on screen.
Cause
Computer is not turned on.
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.
Fuzzy focus; streaking, ghosting, or shadowing effects; horizontal scrolling lines; faint vertical bars; or unable to
center the picture on the screen (flat panel monitors using an analog VGA input connection only).
Cause
Flat panel monitor's internal digital conversion circuits may
be unable to correctly interpret the output synchronization of
the graphics card.
Graphics card is not seated properly or is bad.
162 Chapter 11 Troubleshooting Without Diagnostics
Solution
Press the power button on the front of the monitor.
Connect the video cable between the monitor and computer.
CAUTION: Ensure that the computer power is off while
connecting the video cable.
Solution
Change the settings to a supported setting then restart the
computer so that the new settings take effect.
Solution
Lower brightness and/or contrast settings.
Solution
1. Select the monitor's Auto-Adjustment option in the
monitor's on-screen display menu.
2. Manually synchronize the Clock and Clock Phase on-
screen display functions.
1. Reseat the graphics card.
2. Replace the graphics card.