Acer EB550K Manuel d'utilisateur télécharger pdf (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.

O Check the power switch.

Check if the power cord is properly connected to

the monitor.

Orange 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 specication of graphics adapter and

monitor is in compliance which may be causing

the input signal frequency mismatch.

Abnormal picture Image is missing,

o-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 o the monitor.

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Acer EB550K Manuel d'utilisateur Page 26