Before sending your LCD monitor for servicing, please check the troubleshooting list
below to see if you can self-diagnose the problem.
Problems Current Status
Display is missing,
center shift, or too
small or too large
in display size
Using OSD, adjust brightness and contrast to
maximum or reset to their default settings.
Check the power switch.
Check if AC power cord is properly connected
to the monitor.
Check if video signal cable is properly
connected at the back of monitor.
Check if the power of computer system is ON.
Check if the specification of graphics adapter
and monitor is in compliance which may be
causing the input signal frequency mismatch.
Using OSD, adjust RESOLUTION, CLOCK,
CLOCK-PHASE, H-POSITION and V-
POSITION with non-standard signals.
Using OSD, in case of missing full-screen image,
please select other resolution or other vertical
Wait for a few seconds after adjusting the size of
the image before changing or disconnecting the
signal cable or powering OFF the monitor.