CHAPTER 8
TROUBLESHOOTING
48
Issue
Solutions
A whine or buzzing sound is
coming from the back of the
display.
l
All displays emit some electrical noise. Such sounds may be more noticeable
with some displays than with others. However, if you hear noise from the front of
the display, contact
.
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Make sure all devices are connected to the same power outlet or power bar.
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If the computer is connected to the display with analog audio cables (for
example, 3.5 mm audio cable with the VGA video input), make sure you are
using high-quality cables with electromagnetic interference (EMI) protection.
Make sure audio cables don’t run alongside power cables.
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Use a digital HDMI connection for video and audio. Audio hum is far less
common with digital connections than it is with analog.
You’re experiencing other issues
with audio, or the previous
solutions don’t resolve the issue.
See
Referring to the SMART knowledge base for additional troubleshooting
Resolving issues with touch and digital ink
Issue
Solutions
You’re experiencing the following
or similar issues with touch and
digital ink:
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When users touch or write on
the screen, the pointer or
digital ink appears in the
wrong place.
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Touch control and digital ink
are intermittent.
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The display only responds to
touch on part of the screen.
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Digital ink disappears as you
write.
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If you’re using two pens, make sure they’re at least 2" (5 cm) apart.
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Make sure you are not holding the pen near its tip, and that the pen is at a right
angle (90°) to the screen.
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Restart the display.
See
Turning the display off and back on
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Make sure the pen nib is not worn. Replacement pens are available from the
Store for SMART Parts (see
smarttech.com/Support/PartsStore
).
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Make sure you are using a SMART Board MX series interactive display pen.
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Use a known working pen from another SMART Board MX series interactive
display to check if the issue is being caused by the pen.
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Clean the optical touch sensors. See
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Make sure
SMART Product Drivers and SMART Ink
are installed and running on
any connected computers, and orient your display. See
l
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Confirm with the installers that the computer is connected to the display with
only a single cable.
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Remove any external infrared light sources such as sunlight, incandescent or
arc lights, desk lamps and infrared audio devices or move the display to another
location in the room.
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Remove the display from the wall, calibrate it and confirm if this resolves the
issue. If it does, check the wall and wall mount for issues.
The display responds to touch but
not to writing with a pen.
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Make sure you are using a SMART Board MX series interactive display pen.
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Make sure the pen nib is not worn. A worn pen nib might be interpreted as a
finger touch. Replacement pens are available from the Store for SMART Parts
(see
smarttech.com/Support/PartsStore
).
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Reinstall or update
.