Home Theater Questions? Ask a Technician for Answers ASAP
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Check output via the main or mon out to see if the pre amp is functioning, if there is no life at all to the mixer then you will want to start by checking power at the psb the power board if there is life but no audio out but is out of the pre mon/main out then the problem is likely with the amp, though odd if it is both amps that are out. If only connected to one amp then try the other and see if that one works which would most likely point to a failed amp (would require further testing).
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