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Problem Check Correction
No sound
(no power light)
Is power switch on?
Is line cord connected to live power outlet?
Turn power switch on.
Connect power cord to live outlet.
No sound (power light on) Are MASTER and CHANNEL
LEVEL controls
up?
Adjust both MASTER and CHANNEL LEVEL
controls upward to desired level. Check
speaker connections. Turn mic switch on.
Check mic or sound source connection.
System hum Are all line cord ground connections made
properly on Messenger™ and any auxiliary
equipment connected to Messenger?
Are all connections secure?
Are all interconnect cables shielded, except
the speaker cables?
Does the system hum when touching
microphone?
Turn the volume down on each channel
starting with channel 1, working through the
mixer channels to determine if the problem
is coming from an external audio source,
such as a malfunction in that source or a bad
recording.
We recommend that all units connected to
the Messenger be plugged into the same AC
power strip.
Change the microphone cable and/or
microphone.
Only one speaker works Are speaker cable connectors secure?
Are both MASTER LEVEL controls up?
Fully insert connector and/or swap speaker
cables between left and right speakers and
outputs to check for damaged cables.
Loud howling or squeal from speakers
(known as "feedback" by audio professionals)
If it goes away when the CHANNEL or
MASTER volume controls are lowered, it is
acoustic feedback.
Refer to Avoiding Acoustic Feedback and
Using Graphic EQ sections of this manual.
Reduce microphone volume. Reposition
microphone behind or farther from speakers.
Observe FLS light above EQ and reduce level
of that band.
Sound is distorted Is the CHANNEL LEVEL at a very high
setting?
Reduce CHANNEL LEVEL and increase
MASTER LEVEL.
Troubleshooting Guide