Display Troubleshooting, General Display Problems

DTU193_Manual.fm Page 31 Monday, September 15, 2008 2:42 PM

DISPLAY TROUBLESHOOTING

If you encounter problems with the DTU-1931 display, refer to the following tables; your problem may be described here and you can try the solution offered. For additional information about color issues, see the documentation that came with your operating system or applications.

GENERAL DISPLAY PROBLEMS

No display. The power	•	Verify that the AC power cable is connected, and that the
LED is off.		DTU-1931 power switch is turned on.

No display. The power	•	Check the contrast, brightness, and backlight controls.
LED is lit blue.		Adjust as necessary. Or, open the OSD menu and select the
		RESET option.

The power LED is lit orange.

A ‘no signal go to power save’ message appears briefly on your display screen.

•Your computer may be in a power management mode. Touch the pen tip to the display screen, move the mouse, or depress any key on your keyboard.

•Turn off both your computer and the DTU-1931 pen display tablet. Check the video cable for bent or broken connector pins. Then properly connect the video cable and turn on the DTU-1931 and your computer.

	• Verify that the DVI/VGA switch is properly set. Restart your
		computer after changing the position of the switch.
	• Verify that the video card is properly installed.

A ‘cable disconnect go to	• Check that your computer is turned on.
power save’ message	• Verify that you are using the video cable that came with the
appears briefly on your
display screen.		DTU-1931.
	• Check that the DTU-1931 video cable is fully connected.
	• Turn off both your computer and the DTU-1931 pen display.
		Check the video cable and any video adapters for bent or broken
		connector pins. Then properly connect the video cable and any
		necessary adapters.

An ‘out of range’	• The input signal frequency is incorrectly set or not compatible
message appears briefly		with the DTU-1931. Set the refresh rate (vertical frequency)
on your display screen.		between 50 and 75 Hz. If your video card driver supports
		adjustment of the horizontal frequency, make sure it is set to
		some value between 30 and 80 kHz. On a single monitor system
		you will need to connect a different display to change the refresh
		rate.
	• The resolution is set too high (1280 x 1024, maximum).
	• The refresh rate is set too high (75 Hz maximum).
	• Set the display properties to detect plug and play monitors.

A ‘set refresh range’	•	The maximum refresh rate is 75 Hz. Set the refresh rate (vertical
message appears briefly		frequency) to some value between 50 and 75 Hz.
on your display screen.
The image appears	•	Do not extend the video cable. Do not use an input selector
multiple times on the		switch box.
display.

Troubleshooting

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