Classe CT 5300

I own a Classe CT 5300 that I can only use 3 channels now. Does anyone have experience in getting one fixed and brought back up to spec? Also,  a rough estimate of what it would cost? One channel is out and other weak. I realize this is probably a very crazy question. I think it is an excellent amp and wonder if it is worth fixing of just replacing. I appreciate any advice for those experienced in this area.

Regards