Chapter 5 Troubleshooting the display
smarttech.com/kb/171861 63
Symptom Troubleshooting steps
The image suddenly moves up and
down, and then is stable again.
l
This is normal behavior if the
Pixel shift
setting is enabled in the
System
section of
the display’s settings. This can help reduce the risk of screen burn-in when a static
image is displayed for very long periods. Adjust the feature's timing, or turn off
Pixel
shift
if this is undesirable.
See
System
on page79.
There’s no sound or there’s a problem with the
sound
Symptom Troubleshooting steps
There’s no sound.
OR
There is sound, but the volume is low.
OR
The sound is distorted or muffled.
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If you’re using an external audio system, make sure it is turned on. Use of an
external audio system must also be enabled in display settings.
See
Input and output
on page75.
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Make sure the cables connecting the display to the computer are securely fastened.
Notes
o
The display’s stereo 3.5 mm in connector works with the VGA input only.
o
Connecting an audio cable to the display’s stereo 3.5 mm out connector
disables the internal speakers if the
Sound output settings
(Display
settings > Input and output > Audio output settings) is set to
Auto
.
See
Input and output
on page75.
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If you’re using the display’s stereo 3.5 mm out connector, adjust the volume on both
the display and the connected computer and make sure neither is muted.
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Adjust the display’s audio settings.
See
Advanced settings
on page86.
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If you’re using the integrated speakers, set the volume for the computer and any
running applications to 80%, and then adjust the display’s volume.
OR
If you’re using an external audio system, set the volume for the computer, any
running applications, and the display to 80%, and then adjust the external audio
system’s volume.
There is a whine or buzzing sound
coming from the back of the display.
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Be aware that these sounds are normal. 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, further investigation is
required.
l
Connect all devices to the same power outlet or power bar.
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