Acer K242HL - Manual (Page 26)

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 LED status Remedy
No picture visible Blue Using the OSD, 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.
Amber 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.
Unstable picture Check if the specification of graphics
adapter and monitor is in compliance
which may be causing the input signal
frequency mismatch.
Abnormal picture Image is missing,
off-center, too
large or too
small on the
screen. Using the OSD, adjust focus, clock, H-
position and V-position with non-
standard signals.
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.
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