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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
USB-C test Confirm whether image displays and sound plays
correctly on the monitor
Computer or USB-C 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.
For more information, see Connecting the cables on
System is in Auto-Sleep Mode. Press any key on the keyboard or move
the mouse to inactivate the screen
blanking utility.
Video card is incompatible. Perform one of the following actions:
●Open the OSD menu and select the
Input menu. Set Auto-Switch Input to
Off and manually select the input.
●Replace the video card or connect the
video cable to one of the computer’s
on-board video sources.
Image appears blurred, Brightness is too low. Open the OSD menu and select
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