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Troubleshooting 27
Control and Writing Problems
If the pointer doesn’t accurately follow the movement of the tethered pen or your finger, orient the
DT770 (page 14).
If the digital ink doesn’t appear as you expect, check the customizable pen settings within SMART
Board software. For more information on setting digital ink properties (such as color, line thickness,
line style and transparency) refer to the SMART Board software online Help.
NOTE: You can manipulate objects and create notes on the interactive pen display only if the
computer is running SMART Board tools. You’ll know that SMART Board tools are running if you
can see the SMART Board icon in the system tray or the Dock.
If you can’t manipulate objects or write notes using your finger, ensure that the tethered pen is in
the pen recess and that the pen’s indicator is off. If you place the pen in the recess and the
indicator still glows, move the pen to the side until the indicator stops glowing. The DT770 can
detect objects other than the tethered pen (such as your finger) only when the pen is correctly in
the recess and the indicator is off.
Troubleshooting Summary Table
The following table summarizes the symptoms, the likely causes and the remedies of potential
issues with the DT770.
Symptom Likely Cause Remedy
No LEDs are
illuminated
Power problem Check all the power connections. Ensure you’re using the
power adapter that came with the DT770.
Check that the computer is on, its USB port is active, and
that it’s sending out a video signal.
Check that the DT770 is turned on.
The video
image doesn’t
display on the
screen
Display problem Check that the video cable is connected properly.
Check that the DT770 is turned on.
Check that the computer isn’t in standby mode.
Check that the computer’s resolution setting isn’t higher
than 1280 × 1024 and its refresh rate is set to 60 Hz or 75
Hz.
Reset the on-screen display settings (page 29).
You can see an
image on the
screen, you can
move the
pointer, but you
can’t write notes
over the
application
SMART Board
tools aren’t
running
Check that SMART Board tools are running. You’ll know
that they are running if you can see the SMART Board icon
in the system tray or the Dock.