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<blockquote data-quote="bobby_7" data-source="post: 6532588" data-attributes="member: 559314">I got a friend from work who&#039;s son has an amp that is not working.&nbsp; I dont know a whole lot about amp repair, but I know how to check diodes, transistors, and simple stuff with a meter, so I am just taking a look at it for him.&nbsp; I dont have a whole lot of description about what the amp is doing, but from what he tells me, the amp will come on, won&#039;t go into protect or anything, but the subs will pop and them hum continuously.&nbsp; The first thing that came to my mind is RCA plugs or a ground problem, but he had another smaller amp that he put in and it works fine.Just from this information, is it possible to have any idea of whats going on, aside from a grounding problem (which I can&#039;t check since I don&#039;t have the car)?&nbsp; could this be a MOSFET or something like that, or would I just be wasting my time with checking those?I realize that isn&#039;t much information so I don&#039;t expect much back, but if someone can point me in any direction that would be great. Thanks</blockquote>

[QUOTE="bobby_7, post: 6532588, member: 559314"] I got a friend from work who's son has an amp that is not working. I dont know a whole lot about amp repair, but I know how to check diodes, transistors, and simple stuff with a meter, so I am just taking a look at it for him. I dont have a whole lot of description about what the amp is doing, but from what he tells me, the amp will come on, won't go into protect or anything, but the subs will pop and them hum continuously. The first thing that came to my mind is RCA plugs or a ground problem, but he had another smaller amp that he put in and it works fine. Just from this information, is it possible to have any idea of whats going on, aside from a grounding problem (which I can't check since I don't have the car)? could this be a MOSFET or something like that, or would I just be wasting my time with checking those? I realize that isn't much information so I don't expect much back, but if someone can point me in any direction that would be great. Thanks [/QUOTE]

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