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Function test
After repair, be sure to confirm that all functions are working.
Table 4-1:
Test item
HDMI test
DP test
D-SUB test
Support and troubleshooting
The following table lists possible problems, the possible cause or each problem, and the recommended solutions.
Table 4-2:
Solving common problems
Problem
Screen is blank or
video is flashing.
Image appears blurred,
indistinct, or too dark.
Check Video Cable is
22
Function test
Operating description
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
Possible cause
Power cord is disconnected.
Monitor is off.
Master power switch is set to off.
Video cable is improperly connected.
System is in Auto-Sleep Mode.
Video card is incompatible.
Brightness is too low.
Monitor video cable is disconnected.
Tool used
Computer or DVD
player
Computer or DVD
player
Computer or D-SUB
player
Solution
Connect the power cord.
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.
Set the master power switch
on the rear of the monitor to
the On position.
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
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