17
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.
Table 4-1: Function test
Test item Operating description Tool used
HDMI test Confirm whether image displays and sound
plays correctly on the monitor.
Computer or DVD player
DP test Confirm whether image displays and sound
plays correctly on the monitor.
Computer or DVD player
Audio test Change volume and balance to confirm whether
volume is smooth and loud enough.
Speaker
Table 4-2: Solving common problems
Problem Possible cause Solution
Screen is blank
or video is
flashing.
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
feature.
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,
indistinct, or too
Brightness is too low. Open the OSD menu and
select Brightness to
adjust the brightness scale
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