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 4-2: Solving common problems
Problem Possible Cause Solution
Screen is blank or
video is flashing.
Power cord is disconnected. Connect the monitor power cord.
Power button is turned off. 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.
Computer power is turned off. Turn on power to the computer.
Video cable is not connected. Connect the DisplayPort video cable between the
computer and monitor. Be sure the computer power is off
while you connect the
video cable.
System is in sleep mode.
Press any key on the keyboard or move the mouse to
exit sleep mode.
Video card is incompatible. Replace the video card or connect the DisplayPort
cable to the computer’s onboard DisplayPort.
Image appears
blurred, indistinct, or
Brightness is too low.
Open the OSD menu and select Brightness to adjust
the
brightness scale as needed.
Input Signal Not Found is
displayed on screen.
Monitor video
cable is
Connect the DisplayPort video cable between the
computer and monitor. Be sure that the computer power
is off while you
connect the video cable.
No video signal.
Be sure the computer has sent out a video signal.
Input Signal Out of Range
is displayed on screen.
Video resolution and/or
refresh rate are set higher
than what the monitor
Change the settings to a supported setting.
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
D-SUB test Confirm whether image displays and sound plays correctly
on the monitor
Computer or D-SUB player
Audio test Change volume and balance to confirm whether volume is
smooth and loud enough.
Speaker
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