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<blockquote data-quote="Deiimos" data-source="post: 8765461" data-attributes="member: 682903">I would try cycling all the controls, meaning rotate the gain pot, crossover pot, crossover switch, bass boost, input switch etc., EVERY switch, button, and knob, rotate / move it several times with the amp off, then recheck. Can do the gain and crossover freq knobs with the amp on playing low, but might get bad pops and damage speakers if you move switches with the amp on. Channels dropping out can be as simple as a dirty switch or potentiometer, have had a bunch of amps when I repaired them that needed cleaned, so it is a possibility. And of course broken RCA connector, but would have to take it apart to inspect for that.I know the Rockville amp isn’t all that old so dirty contacts is less likely, but still something I would check and or even clean if you’re out of options (not always easy to do though or even get cleaner into the pots).And not to give Rockville credit of any kind, but I&#039;m pretty sure most people would be denied warranty from just about any brand if it fails once the warranty is over. Annoying to get refused, but only occasionally do companies hook people up after warranty.</blockquote>

[QUOTE="Deiimos, post: 8765461, member: 682903"] I would try cycling all the controls, meaning rotate the gain pot, crossover pot, crossover switch, bass boost, input switch etc., EVERY switch, button, and knob, rotate / move it several times with the amp off, then recheck. Can do the gain and crossover freq knobs with the amp on playing low, but might get bad pops and damage speakers if you move switches with the amp on. Channels dropping out can be as simple as a dirty switch or potentiometer, have had a bunch of amps when I repaired them that needed cleaned, so it is a possibility. And of course broken RCA connector, but would have to take it apart to inspect for that. I know the Rockville amp isn’t all that old so dirty contacts is less likely, but still something I would check and or even clean if you’re out of options (not always easy to do though or even get cleaner into the pots). And not to give Rockville credit of any kind, but I'm pretty sure most people would be denied warranty from just about any brand if it fails once the warranty is over. Annoying to get refused, but only occasionally do companies hook people up after warranty. [/QUOTE]

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