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
too dark.
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
disconnected.
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
supports.
Change the settings to a supported setting.
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
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