Elekit 8200 loud hum, then blown internal fuse

Hello all
My Elekit 8200 suffered some kind of electrical surge that tripped the breaker on the circuit that it was plugged into. When I turned the amp on all I got was a loud hum in the left speaker, nothing in the right speaker. The tube heaters came on. I turned it off, and then turned it on again. Same loud hum, noticed that the green LED was AMBER now. In about a minute I smelled some heat then it shut off by itself. The internal fuse was blown and resistors #19 and #21 were BURNT!!

Any ideas on how to procced? Is there anyone who can diagnose and fix board?

Thank you -
Bill Tecosky