12
No Audio
Is your power supply plugged into the amplifier/receiver and the wall out-
let?
YES
– Is the power switch set to “On” and the indicator light red?
YES
– Is the teacher transmitter turned on with a green
battery light?
YES
– Is the green indicator light on the
amplifier/receiver for Teacher 1 or 2
on?
YES
– Try another transmitter
in your room to determine if it
works and contact Prome-
thean .
NO
– Verify if a red light is
showing on the dome sensor
and contact Promethean .
NO
– Are your batteries fully charged?
YES
– If the batteries are more
than 1 year old please replace
the batteries. If the problem
persists contact Promethean
for assistance.
NO
– Charge the batteries
overnight.
NO
– Will other items power up in that outlet?
YES
– If available try another outlet. If the
problem persists contact Promethean .
NO
– Contact the school
NO
– Plug in the amplifier/receiver to the wall outlet.
Troubleshooting
Summary of Contents for ActivSound 75
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