
Troubleshooting
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.
| What is seen... | Suggested Action | Reference | 
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| The screen is blank, and the | Ensure that the power cord is firmly connected | 
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| power indicator is off | and that the monitor is on. | 
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| “No Connection, Check | • Ensure that the signal cable is firmly | 
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| Signal Cable” | connected to the computer system or video | 
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 | board. | 
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 | • Ensure that the computer system is turned on. | 
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| “Video mode not | • Check the maximum resolution and the | “Specifications” on | 
| supported” | frequency on the video port of the computer | page 18 | 
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 | system. | 
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 | • Compare these values with the data in the | 
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 | Display resolution section of the LCD Panel | 
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 | specifications table. | 
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| The image is too light or too | Adjust Brightness and Contrast. | “Main Menu” on | 
| dark | 
 | page 13 | 
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| Vertical bars flicker, or | Adjust the Phase function. | “Main Menu” on | 
| shimmer on the image | 
 | page 13 | 
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| The screen is blank and the | The monitor is using its power management | 
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| power indicator light blinks | system. Move the computer system’s mouse, | 
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| every  | or press a key on the keyboard. | 
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| The image is not stable or | Check that the display resolution and | “Specifications” on | 
| appears to vibrate | frequency from your computer system or | page 18 | 
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 | video board matches an available mode for | 
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 | your monitor. | 
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| The image is not centered | Adjust the horizontal and vertical positions. | “Main Menu” on | 
| on the screen | 
 | page 13 | 
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| Rack LCD Monitor Keyboard Mouse Installation | 17 |