U100 Troubleshooting Diagram
No sound?
Issue resolved.
Issue resolved.
For further
assistance, contact
SMART Technical
Support.
(A)
For further
assistance, contact
SMART Technical
Support.
(B)
4.1 No sound
Confirm the computer is
set to output the audio to
U100 (HDMI/USB)
Bypass ECP (If
connected). Is the issue
resolved?
Bypass CAT5 extenders
(If connected)
No
Issue resolved. Try good
known CAT5 extenders
Yes
Swap the HDMI/audio
cable and confirm the
connections are secured
from both sides.
Issue resolved.
Yes
No
Is the internal speaker
working?
No
Press the menu button
on the projector remote
and make sure speaker
is “ON” and the volume
is set to 20. Is the issue
resolved?
Confirm that 3.5mm
stereo mini cable from
the projector's audio jack
is securely connected to
speakers. Is the issue
resolved?
Yes
Swap the 3.5mm stereo
mini cable. Is the issue
resolved?
No
Issue resolved.
Yes
Yes
No
Try another computer/
audio source with the
projector. Is the issue
resolved?
Issue resolved.
No
Swap ECP with a good
know working unit. Is the
issue resolved?
Yes
No
Yes
No
Issue resolved.
Yes
Yes
No
No