I sat down to play guitar yesterday, (Yes, I play guitar as well as bass. Help me out anyway.) and I think I blew a tube, or something. I have no real idea how to maintain or diagnose amps, so I'll just describe what happenend, and hopefully, someone will be able to help. I switched on my amp (A fender bassman reissue). I sat down to change a string while the tubes warmed up. About five seconds after switching on the amp, it made this loud "KKKKRRRRCHKKKKKKK" noise, and died. No sound. The power switches do nothing. Flip them on, no power light. (I guess I mistakenly threw the Standby switch as well as the Power switch while turning on the amp. I've heard this is a bad thing, that you're supposed to leave the amp on Standby until the tubes are fully warmed up.) Thanks in advance for any help you might be able to give me. I would've posted this on a guitar forum, but if you've been to guitar.com or the like lately, you'll know why I posted here. Thanks again.