Fuse, Tubes, other symptoms of something blown? :-(

[Diminished Triad]

It started with light pops (about 5 minutes after powering up, tuning my guitar and warming up)...then a hum with increasing electrical sound (as opposed to hum caused by pickups, etc). Turned off the amp...turned it back on and no light....no anything. Checked the fuse and discovered a blown fuse - my little experience with trouble shooting amps is that a blown fuse is almost always symptomatic of a separate problem.

Do these symptoms (starting with some light frequency popping, then a hum, and then a stronger hum almost like a smooth operating electric chair!) point to something obvious other than a big problem?
Going to take the amp in later today - almost brand new never cranked up or played outdoors...probably a few months old (Fender Super-Sonic 100).

Thanks for any help you can share!

 

[Toe-Knee]

Re: Fuse, Tubes, other symptoms of something blown? :-(

Sounds like you could have had some redplating going on. Did you happen to see the valves at all just as you turned it off?

 

[Diminished Triad]

Re: Fuse, Tubes, other symptoms of something blown? :-(

Sounds like you could have had some redplating going on. Did you happen to see the valves at all just as you turned it off?

Looked at them within 30 seconds of sounds/losing power and could not see anything abnormal.

 

[Diminished Triad]

Re: Fuse, Tubes, other symptoms of something blown? :-(

The amp doctor diagnosed yesterday as some moisture in the tubes and fortunately all covered by warranty.