I have a 4040dsm amp with a blown channel. 1, 2, and 4you work but 3 is dead as a doornail. Opened it up and no visually bad components. Any ideas on how to start testing it? I suspect its part of the output section that's bad, but this is the first electronics I've tried to repair without something obvious being bad. Thanks and ill post ia pic later
blown channel on a rockford amp
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