18
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 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.
System is in Sleep mode.
Press any key on the keyboard
or move the mouse to exit
Sleep mode.
Video card is incompatible.
Open the OSD menu and
select the Input Control menu.
Set Auto-Switch Input to Off
and manually select the input
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.
Check Video
Cable
is
displayed on
screen.
Monitor video cable is disconnected.
Connect the appropriate video
signal cable between the
computer and monitor. Be sure
that the computer power is off
while you connect the video
cable.
Summary of Contents for U28
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