Troubleshooting
Page 33
3.
Verify that the tablet and pen are working:
•
Press the pen tip against the display and verify that the status LED lights blue.
•
If the LED does not light, verify that the DTF-521’s USB cable is plugged into an active USB
port. If the DTF-521 is plugged into a USB hub, try plugging it directly into the USB port on
your computer.
•
Be sure that the USB port to which you are connecting has not been disabled. It may be
necessary to check your system BIOS setting to verify that you have connected the DTF-521 to
an active USB port.
•
The status LED will light blue when the DTF-521 is registered as a USB device and the pen tip
is pressed against the display.
4.
Check the pen.
If you cannot make a selection on the display screen with the pen:
•
Test the pen by pressing the pen tip against the surface of the pen display tablet. The tablet
status LED should light blue.
•
Now, without applying pressure to the pen tip but keeping the pen within 5 mm (0.2 inch) of the
pen display tablet surface, press the side switch. The status LED should again light blue.
•
If the status LED does not light blue for these tests, be sure you are using the correct pen that
came with your DTF-521.
If you are still having problems, you may have a defective pen or pen display.
DTF521_Manual.fm Page 33 Thursday, October 25, 2007 3:46 PM
