okay, so my ongoing struggle to keep my jcm2000 working has taken another turn. About three weeks ago it just stopped producing sound, so i took it to my semi-local guitar shop and they charged me 115 bucks for what they said was a cracked solder joint that led to one of the tubes blowing up, then about two weeks ago the amp just crapped out again, i took the back plate off and found that one of the power tubes had blow once again, along with both the fuses blowing out as well, so i just bought another duo of power tubes on the internet and replaced the fuses, it seemed to be working fine but today my amp blew out the 2amp fuse. does anyone have any idea what could be wrong with it? Im going to take it back to the guitar shop tomorrow but i just want to see if anyone has any ideas. thanks!