I have a Fender hotrod deluxe, and one day it went dead. I looked at the tubes and noticed that the very right small tube was not lit. I picked up a new tube and changed it. At first it worked but the amp was so quiet i turned it up to like 8 and i usually dont ever play past 3 because that is SO loud, and at 8 it was hardly loud at all. The sound faded away and now doesnt work. The brand new tube isnt lit, but i dont know if it ever was lit at all. Any help on what the problem could be?? i did have a previous problem, a year ago it kept blowing fuses, so i bought bigger fuses and it fried those, so i found a shop and it was something to do with the power. got it replaced worked great for the past year, and then it died, i also noticed that i still had the bigger fuses in there, could that be a problem??