New system, 4 12" subs, one amp not working protect light mystery.

Ok, so I had a 4 sub 2 amp system. Just plugged it all in today, finally.

And the amps were working for a minute, and then one of them went into protect, just the protect light. (When the amp turns on, both power and protect turn on and the protect is supposed to dim out. but now the power dims out.) But the other one was fine and playing notes. So i switched all the wires, subs and all, between the two amps, to see if it was wire, but it wasn't. same amp was in protect while the other worked. The amp goes into protect as soon as it turns on with no RCAs or speakers. only 12v, ground, and the remote.

basically I discovered this was my used amp, because I had the 4 subs on one of these amps, but discovered I could add another amp safely. so the old amp is the one going into protect. But when I say old, I mean like 3 months. I see nothing wrong on the inside of the amp, however i'm no circuit board genius.

Could it be the fuses somehow? They arn't burnt through or even scorched at all, but could that maybe put it into protect?

I dunno. I'm stumped. Hopefully its covered under warranty.

 

MA audio all around. 4 subs all MA120XE's 2 amps all HK898's.

its not impedance. I got them running 1 sub per channel at 2 ohms each. And like I said, one worked, one went into protect for an unknown reason. so i switched all the wires from the working one the the protect one, just to see the protect light still on.

I'm not new to car audio or anything, just to this site, so the typical things you can pretty much rule out.

The problem is inevitably the amp, the only thing wrong on the inside I can see is it looks a little toasty in some spots, but this amp was NEVER used under impedance or over power. and it went into protect during a low volume test.

 

I have both amps running off the same ground, but is it still possible that maybe its a bad ground?

Wasn't the ground. That was just something I read. It's gotta be something on the inside of the amp...

I read that it might be the output transistors because the protect light is on but not the power?

 

where can i buy them from?

 

Im no good with circuit boards, so how can I tell which transistors to buy? and do i just clip the prongs and solder new transistors on? also, how can I tell if its pnp or npn?

looks like on one side i have C4487, C4487, A1694, A1694, FMG22S, FMG22S, IRFZ48V, IRFZ48V, IRFZ48V, IRFZ48V.

So I assume its identical on the other side. but I cant find these at that site, besides the IRFZ48V.

I assume the other ones are transistors, they have 3 prongs, just bigger. I could be wrong.

 

I started google-ing them, I think I might just send it to car tunes or something, if thats all it is are the transistors, it shouldn't cost to much.

 

Here's a panoramic of one side. as you can see the far right ones are a little toasty. the nest two are closeups of the far side ones on both sides. They might have gotten a little to much moisture to them? because we had EXTREMELY humid days recently, like light rain and sunny all day a couple times. but they have looked like that for a few weeks now and still worked. They look worse in the closeups than they actually are by the way.