16
Function test
After repair, be sure to confirm that all functions are working.
Support and troubleshooting
The following table lists possible problems, the possible cause or each problem, and the recommended
solutions.
Test item Operating description Tool used
HDMI test Confirm whether image displays correctly
Computer or DVD player
VGA test Confirm whether image displays correctly
on the monitor.
Computer or DVD player
Table 4-2: Solving common problems
Problem Possible cause Solution
Screen is blank or video is
Power cord is disconnected. Connect the power cord.
Monitor is off. Power the power button.
NOTE: If pressing the Power button has no
effect, press and hold the power button for 10
seconds to disable the Power button lockout
Video cable is improperly connected.
Connect the video cable properly.
System is in Sleep mode. Press any key on the keyboard or move the
mouse to exit Sleep mode.
Video card is incompatible. Open the OSD menu and select the Input
Control menu. Set Auto-Switch Input to Off
and manually select the input
Image appears blurred,
Brightness is too low.
Open the OSD menu and select Brightness to
adjust the brightness scale as needed.
Check Video Cable is
displayed on screen.
Monitor video cable is disconnected. Connect the appropriate video signal cable
between the computer and monitor. Be sure
that the computer power is off while you
connect the video cable.
Input Signal Out of
Range is displayed on
Video resolution and/or refresh rate
are set higher than what the monitor
Change the settings to a supported setting.
The monitor is off, but it
did not seem to enter into
The monitor’s power saving control is
disabled.
Open the OSD menu and select Power Control
> Auto-Sleep Mode and set auto-sleep to On.
On-Screen Menus are
The monitor’s OSD lock function is
Press and hold the Menu button on the front
bezel to 10 seconds to disable the OSD
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