American Power Conversion LCD Monitor Keyboard Mouse Benutzerhandbuch

If you have a problem setting up or using the monitor, use the following troubleshooting actions to 
try to solve the problem before contacting APC Worldwide Customer Support at a phone number 
listed at the back of this manual.

The screen is blank, and the 
power indicator is off

Ensure that the power cord is firmly connected 
and that the monitor is on.

“No Connection, Check 
Signal Cable”

• Ensure that the signal cable is firmly 

connected to the computer system or video 
board.

• Ensure that the computer system is turned on.

“Video mode not 
supported” 

• Check the maximum resolution and the 

frequency on the video port of the computer 
system.

• Compare these values with the data in the 

Display resolution section of the LCD Panel 
specifications table.

The image is too light or too 
dark

Adjust Brightness and Contrast.

Vertical bars flicker, or 
shimmer on the image

Adjust the Phase function.

The screen is blank and the 
power indicator light blinks 
every 0.5–1 second

The monitor is using its power management 
system. Move the computer system’s mouse, 
or press a key on the keyboard.

The image is not stable or 
appears to vibrate

Check that the display resolution and 
frequency from your computer system or 
video board matches an available mode for 
your monitor. 

The image is not centered 
on the screen

Adjust the horizontal and vertical positions.