Acer EB321HQU User Manual - Page 25

Troubleshooting - refresh rate

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Troubleshooting Before sending your LCD monitor for servicing, please check the troubleshooting list below to see if you can self-diagnose the problem DVI-DL/HDMI/DP mode Problem LED status No picture visible Blue Off Remedy Using the OSD, adjust brightness and contrast to maximum or reset to their default settings. Check the power switch. Orange Check if the power cord is properly connected to the monitor. 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, Check the display setting on your system. In off-center, too case of a missing image, please select another large or too small resolution or vertical refresh rate. on the screen. Wait for a few seconds after adjusting the size of the image before changing or disconnecting the signal cable or switching off the monitor. 16

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Troubleshooting
Before sending your LCD monitor for servicing, please check the troubleshooting list
below to see if you can self-diagnose the problem
DVI-DL/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.
Off
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 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.
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.
16