I have a Fender Super Sonic from the original run a few years ago. I’m the second owner, been well cared for with both of us. Recently, it developed an issue where, long story short, preamp shuts off, and amp just hums. Took it into my local shop for a diagnosis. Got a call back, that “something” blew out the preamp tubes, and left the power side unharmed. I found that a little incredulous, but for the sake of this discussion, let’s not debate that, unless it’s complete BS. Also, he recommended a few solder joints to be redone. So now, I’m debating putting about $100 of tubes into the amp, just to see if they can figure out the issue that blew them. Plus, the labor of fixing it. A conservative estimate puts it over $200 for a $600 amp. Am I throwing good money after bad? The money isn’t going to make or break me, so that’s not really an issue. And I’m certainly not married to this amp, although I do like it a lot. I’ve never had an amp fail like this, so this is all new ground for me, and looking for some guidance. What I’m looking for, i guess, is what others have done in roughly similar circumstances. Fix a non-treasured amp, or give it the old FIDO treatment, and look for a new one.