Sunn Beta Lead blown?

[Perique]

Howdy.So recently the fuse of my Sunn Beta Lead 212 popped. I replaced the blown fuse with a new fuse, and as soon as i turned it up(all knobs down), it gave off a deep hum, and i started seeing sparks fly out of the vent, and i started smelling slight smoke. I quickly turned off the amp, and saw a few sparks still going of seconds after, then it stopped.
I don't know what happened, and my knowledge in the field of electronics lacks for me to make any diagnosis.
Any help/advice greatly appreciated.Thank You!

[Enzo]

Flames from the amp itself? then the power amp section blew out and needs repair. If you are not used to sodlering transistors onto circuit boards and weilding a meter, then this is better left to a technician to fix.