Hi! new to this forum as of today!. No knowledge at all about this stuff.Thanks to you and everyone else in advance for sharing your knowledge. My pro media 2.1 left channel is out, so Im attempting to disassemble to take a look. anyway checked the fuses and looks ok. Is the power supply the big heavy unit that sits inside. looks like theres 4 nuts to remove? Anyway 2 of those nuts look like they are kine of hard to get to. I think I can get them off, but how about putting them back on? How do you hold the nuts to get them back on? I guess once you have that big heavy unit out, it looks like it would be easier to take a look. Anyway I see 2 boards that look exactly the same and all the numbers start with 3 one one board. and with 4 on the other. They each have a fuse. Would they be for left channel/right channel? After taking a long look. I didnt exactly see anything burnt or obvious, there might be a little darkness on the inner board down by R309 - R311, cant really tell, because its the inside board. Do you happen to know which one is left and which one is right, that is if it works that way?. Sure I have a bunch of other questions, but I just better take it step by step. Thanx!