25
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 3-1 Common issues and solutions
Issues
Possible cause
Solution
Screen is blank or
video is
blinking.
Power cord is disconnected. Connect the power cord.
Monitor is off. Press the monitor power button.
NOTE: If pressing the power button has no
effect, press and
hold the power button for 10
sec 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
page 10.
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.
Open the OSD menu and select the Input
menu. Set Auto- Switch Input to Off and
manually select the input.
or
Replace the video card or connect the
video cable to one of the computer’s on-
board video sources.
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
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