My Kustom Coupe 36 stopped working this week. Pilot light isn't on, power tubes aren't lighting up. There is another light that shows the channel in use that is working. I've haven't removed the covers to see if the preamps tubes are lighting up. No advance warning. I'm going to take it to Sam Ash most likely because I don't really see an independent shop close by. When they look at it, what kind of repair can I reasonably expect? I assume a fuse has blown for some reason. What other kind of explanation is likely?