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Function test
After repair, be sure to confirm that all functions are working.
Table 4-1: Function test
Te
Test item
Function test
st item
HDMI test
HDMI test
DP test
DP test
Table 4-1: Function test
Audio test
Audio test
Support and troubleshooting
The following table lists possible problems, the possible cause or each problem, and the recommended solutions.
Problem
Screen is blank or
video is flashing.
Image appears blurred,
indistinct, or too dark.
"Check Video Cable"
is displayed on the screen.
18
Operating description
Operating description
Confirm whether image displays and sound plays
After repair, be sure to confirm that all functions are working.
correctly on the monitor.
Confirm whether image displays and sound plays
correctly on the monitor.
Confirm whether image displays and sound plays
correctly on the monitor.
Confirm whether image displays and sound plays
correctly on the monitor.
Change volume and balance to confirm whether
volume is smooth and loud enough.
Change volume and balance to confirm whether
volume is smooth and loud enough.
Possible cause
Power cord is disconnected.
Monitor is off.
Video cable is improperly connected.
System is in Auto-Sleep Mode.
Video card is incompatible.
Brightness setting is too low.
Monitor video cable is disconnected.
Tool used
Tool used
Computer or DVD
player
Computer or DVD player
Computer or DVD
player
Computer or DVD player
Speaker
Speaker
Solution
Connect the power cord.
Press the monitor 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.
Connect the video cable
properly.
Press any key on the
keyboard or move the mouse
to inactivate the screen
blanking utility.
Open the OSD menu and
select the Input menu. Set
Auto- Switch Input to Off
and manually select the
input. Or replace the video
card or connect the video
cable to one of the
computer's on-board video
sources.
Open the OSD menu and
select Brightness to adjust the
brightness scale as needed.
Connect the appropriate
video signal cable between
the computer and monitor. Be
sure that the computer power
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