DELL S2722DZ (210-BBSK) - Инструкция по эксплуатации - Страница 67

Troubleshooting

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67

This dialog box also appears during normal operation and when the video cable is 
disconnected or damaged.

4. 

Turn off your monitor and reconnect the video cable; Then, turn on both your 
computer and the monitor.

If your monitor screen remains blank after you use the previous procedure, check your 
video controller and computer, as your monitor is functioning properly.

Built-in diagnostics

Your monitor has a built-in diagnostic tool. It helps you determine if the screen 
abnormality that you are experiencing is an inherent problem with your monitor, or with 
your computer and video card.

To run the built-in diagnostics:

1.  Ensure that the screen is clean (no dust particles on the surface of the screen).
2.  Press and hold 

Button 4

 for four seconds, a menu appears on the screen.

3.  Select the Built-in diagnostics 

 option. A gray screen is displayed.

4.  Observe if the screen has any defects or abnormalities.
5.  Press 

Button 1 

on the front panel again. The color of the screen changes to red.

6.  Observe if the screen has any defects or abnormalities.
7.  Repeat steps 5 and 6 until the screen displays green, blue, black, and white 

colors. Note any abnormalities or defects.

The test is complete when the text screen is displayed. To exit, press 

Button 1 

again. 

If you do not detect any screen abnormalities upon using the built-in diagnostic tool,  
the monitor is functioning properly. Check the video card and computer.