
DTF521_Manual.fm Page 31 Tuesday, February 28, 2006 10:36 AM
Display troubleshooting
If you encounter problems with the 
General display problems
  | No display. The power LED is off.  | • Verify that the AC power cable is connected, and that the  | ||
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  | No display. The power LED is lit  | •  | Check the contrast, brightness, and backlight controls. Adjust as  | |
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  | necessary, or open the OSD menu, go to the RESET menu and select  | |
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  | the RECALL option.  | 
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  | The power LED is lit orange.  | •  | Your computer may be in a power management mode. Touch the  | |
  | The following message appears  | 
  | pen tip to the display screen, move the mouse, or depress any key on  | |
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  | your keyboard.  | ||
  | briefly on your display screen:  | 
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  | • Turn off both your computer and the   | |||
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  | and check the video cable for bent or broken connector pins.  | 
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  | Then properly connect the video cable and turn on the pen display  | 
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  | and your computer.  | 
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  | • Verify that the video card is properly installed.  | |
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  | The following message appears  | • Check that your computer is turned on.  | ||
  | briefly on your display screen:  | • Verify that you are using the video cable that came with the  | ||
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  | • Check that the   | |
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  | • Turn off both your computer and the   | |
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  | and check the video cable and any video adapters for bent or broken  | 
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  | connector pins. Then properly connect the video cable and any  | 
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  | necessary adapters.  | 
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  | The following message appears  | • The input signal frequency is incorrectly set or not compatible with  | ||
  | briefly on your display screen:  | 
  | the   | |
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  | frequency) between 45 and 70 Hz. For other modes, set the  | 
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  | frequency to some value between 45 and 75 Hz. If your video card  | 
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  | driver supports adjustment of the horizontal frequency, make sure it  | 
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  | is set to some value between 30 and 57 kHz. On a single monitor  | 
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  | system you will need to connect a different display to change the  | 
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  | refresh rate.  | 
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  | • The resolution is set too high (1024 x 768, maximum).  | |
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  | • The refresh rate is set too high (70 Hz maximum for XGA, and 75 Hz  | |
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  | maximum for other modes).  | 
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  | • Set the display properties to detect plug and play monitors.  | |
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  | The following message appears  | •  | The maximum refresh rate in XGA mode is 70 Hz. Set the refresh  | |
  | briefly on your display screen:  | 
  | rate (vertical frequency) to some value between 45 and 70 Hz.  | |
Troubleshooting page 31