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Troubleshooting - Acer EK220Q Abi User Manual

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Troubleshooting

Before sending your LCD monitor for repair, go through the troubleshooting checklist
below to see if you can diagnose the problem.
(VGA mode)
Problem
No picture
Picture
abnormal
Audio abnormal
(only Audio
input model)
(optional)
Status
LED lights up
LED off
LED flashes
Picture is
unstable
The display
disappears,
cannot be
centered, or
is too large or
small
No audio, or
the volume is
too low
Solution
Press the standby button to turn on.
Check the power switch.
Ensure that the AC power adapter is
properly connected to the monitor.
Check that the video signal cable is
properly connected to the back of the
monitor.
Check whether the computer system's
power is on.
Check whether the graphics card
specifications meet the monitor
requirements. If they do not, the input
signal frequency may not match.
Use OSD to adjust Resolution, Timing,
Timing Phase, H. Position, and V.
Position for non-standard signals.
When the full screen image disappears,
use the OSD to select another resolution
or vertical frequency.
Before changing or disconnecting the
signal cable or turning off the monitor,
resize the image and wait for a few
seconds.
Check whether the audio cable is
connected to the PC.
Check if the volume of the PC is set
to minimum, and try to increase the
volume.
19

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