AOpen 24CH3Y User Manual page 29

Troubleshooting
Before sending your LCD monitor for servicing, please check the troubleshooting list
below to see if you can self-diagnose the problem.
VGA Mode
Problem
No picture visible
Unstable picture
Abnormal picture
LED status
Green Using the OSD menu, adjust brightness and
contrast to maximum or reset to their default
settings.
Off Check the power switch.
Check if the power cord is properly connected
to the monitor.
Red Check if the video signal cable is properly
connected at the back of monitor.
Check if the computer system is switched on
and in power saving/standby mode.
Green
Check if the specification of graphics adapter
and monitor is in compliance which may be
causing the input signal frequency mismatch.
Image is missing, Using the OSD menu, adjust focus, clock,
off-center, too H-position and V-position with non-standard
signals.
large or too small
on the screen
Check the display setting on your system. In
case of a missing image, please select another
resolution or vertical refresh rate.
Wait for a few seconds after adjusting
the size of the image before changing or
disconnecting the signal cable or switching
off the monitor.
Remedy
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