My Fender FM25 DSP suddenly stopped working. I was playing along and then I it just started buzzing. I turned it off and noticed the red light stayed on much longer then normal. Like it was having issues draining the current. The amp is only used as a practice amp at home. It has never been turned up past 5 on the dial. I was using the clean channel with reverb when it went south. Anyone have any ideas? the amp is probably 5 years old and really has not been used that much.

SOURCE: Fender Frontman 65R Solid State guitar amp.

There is a protection thermistor in the circuit to keep it from over-heating, this is why it works again when it cools. Check and make sure you are not covering any ventilation holes, or if the unit has a fan, make sure it is working.

SOURCE: fender M-80 electric Guitar Amp.

You might have a ground problem. Does it do it in different outlets or when you take it to someone else's house? One easy solution to ground problems can be running a three prong to two prong adapter on the power cable. Give that a try and see if it helps.

SOURCE: Fender passport model # 250 Used Only Twice!

go back in and find where the electrolitic capacitors connect to the board. They look kind of like a battery. One or both of them have broken loose from the main board, preventing any significant current from going to the output transformer, and causing overload. This is a common problem, and it does not take much rough handling to cause it.
where the break is is at the solder connection. Under a magnifying glass, the break will look like a little circle. Float fresh solder on that or any other large solder joints which may be cracked or broken.
Use standard precautions when working around high voltage.

SOURCE: Hot Rod Deville, reverb squeal...

Here is an article that might help:http://www.guitarplayer.com/article/reverb-troubleshooting/jun-09/97165 Here is the schematic:http://www.fender.com/support/amp_schematics/pdfs/Hot_Rod_DeVille_Schematic.pdf Check to see if someone hasn't reversed the input and output cables at the reverb tank. Then troubleshoot the reverb section .

SOURCE: Fix Reverb unit on Fender Hot-Rod Deluxe Amp

Could have broken a spring in the reverb tank, or a wire connecting it to the amp, or the reverb driver tube, or a few other things, but those are the most likely in this situation. Thats what I'd check first. Give it a little slap and if it vibrates like normal, your spring is probably ok, you can still open it up and double check though. Check your wires. Then pull your reverb driver tube and replace it. If that doesn't work, it is probably in the circuit somewhere, and you should not work on your amp unless you know what you are doing. They store large amounts of electicity in the caps and they can kill you.