Acer EB490QK User Manual download pdf (Page 27)

HDMI/DP 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.

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 EB490QK User Manual Page 27