Behringer Eurolive B1800D Pro Amp turns on then off then on

Hello all, I recently picked this Eurolive 1800D pro for next to nothing and the problem is that it was going on then off then on through a continuous cycle, I've read another thread about the same thing and ended up being the bootstrapping capacitors, I was wondering if anyone could show me a picture or something that showed those capacitors or some places I could test to see if that's the problem or how to test the irs20957s, just need some ideas on where to start, thanks!