For the second time in the last 3 months my rumble 500 2x10 combo shut down during a gig. The lights are on showing it is on but no sound. I had it tested by a local tech and it was working properly. He told me that it's possible the wiring harness connecting the amp to the speaker may sometimes need to be disconnected then reconnected to reset the amp.
Ugh - has anyone else had this issue? I love the amp but that's a big process just to reset the amp, especially in the middle of a gig.
Ugh, IDK... but what your tech said seems off to me.
Not that he said it was working properly. It could have been while he had it. That's the problem with intermittent problems. That being said, some techs know diagnostics procedures that help them have a better chance of wringing out those problems. Well yes I guess that part is weird too. If you bring it to him, it obviously is not working properly. Why would he suggest that it is?
What really bothers me is the idea of disconnecting and reconnecting to get it going. While that might be the case, that is a diagnostics procedure, not an end solution.
If you think about this, the amp has to be powered down to disconnect the speaker, but the problem only happens when it is running.
Was he alluding to corrosion on the contacts? If so, why didn't he try cleaning them? Was he suggesting that the connector might be loose? If so why didn't he do something to fix that?
If a tech gives you an answer that 1, doesn't make sense, or 2, he thinks you now have to operated the equipment differently than you used too, it's time to find a new tech.
Overheating is a possibility. Maybe a fan isn't running like it should. Maybe the dust and dirt needs to be cleaned out. Perhaps there is a part that is now out of spec? Who knows? None if us. But a good tech will tackle whatever is needed and not just send you off with "probably" or try to re-write how to operate the gear differently from how the factory designed it to be operated.
Something not being up to snuff on the power feed is possible. Did both shutdowns happen at the same place, or different venues?
We can play guessing games all day long, but the only person who can restore your amp to proper operating condition is a QUALIFIED amp technician.
You got unlucky with the first guy. Have you contacted Fender? Maybe they can help you find someone in your area who knows what he's doing.
