“No Connection, Check Signal Cable” displays on screen.
Cause Solution
Computer is not turned on. Press the power button on the front of the monitor.
Monitor video cable is disconnected. Connect the video cable between the monitor and computer.
CAUTION: Ensure that the computer power is off while
connecting the video cable.
“Out of Range” displays on screen.
Cause Solution
Video resolution and refresh rate are set higher than what
the monitor supports.
Change the settings to a supported setting then restart the
computer so that the new settings take effect.
High pitched noise coming from inside a flat panel monitor.
Cause Solution
Brightness and/or contrast settings are too high. Lower brightness and/or contrast settings.
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 Solution
Flat panel monitor’s internal digital conversion circuits may
be unable to correctly interpret the output synchronization of
the graphics card.
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.
Graphics card is not seated properly or is bad. 1. Reseat the graphics card.
2. Replace the graphics card.
162 Chapter 11 Troubleshooting Without Diagnostics
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