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Function test
After repair, be sure to confirm that all functions are working.
Table 4-1:
Function test
Test item
HDMI test
DP test
USB-C Alt-Mode
USB-C PD
Function
USB Hub 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.
Operating description
Confirm whether image displays
Confirm whether image displays
Confirm whether image displays and sound plays
correctly on the monitor.
Confirm PDO/Charging working normally.
Confirm USB function of 4-USB Type-A working
normally.
Possible cause
Power cord is disconnected.
Monitor is turned off.
Video cable is improperly connected.
System is in Auto-Sleep Mode.
Video card is incompatible.
Tool used
Computer or DVD player
Computer or DVD player
Computer or Notebook
Notebook
Computer or Notebook
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.
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
17
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