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My protection light is green but i get know sound.

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If no channels are heard, it might not be the power amp section to blame, in any case the protect mode would only activate if an overload was present, caused by faulty speakers or wiring often!
Having said that the power amp could be to blame, but only if the amp used a single IC to output stereo channels.
Apart from that what you are looking for is something that is common to both channels, perhaps a pre-amp IC?
Hope that narrows the culprit down for you.

Posted on Jun 04, 2010

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