Amplifier trouble shooting BC-2 Blue Circle

I have a pair of BC-2, which I tried to drive a passive pair of subwoofers. Because I did not know how to bi amp, I simply added plugged it from a preamp out...and while I felt some rumbles, it really did not do much since it shut down. The lights in the front are still on, I can still hear some minimal music...but when I opened it, I realized that two of the fuses were shot in each, I replaced them both, but I did not replace the third pair. Still, the amp refused to run, therefore, I am wondering I should I do, I am against sending it to Canada for factory work and yet, I do not want to trust this sort of equipment to a regular tech.....What happened to the amp? Is there an extensive repaired that will be involved? Any recommendations would be appreciated.

PAUL