I have a Peavey 5150 combo, and randomly, when I turned it on today, it would not give me any distortion on either channel. To anyone not familiar with this amp, it is pretty much known for the crazy amount of distortion it gives. I'm not knowledgeable about amplifiers at all, so I have no idea why it stopped working. Can anyone tell me?
Maybe a long shot but clean the vol and master (or pre and post) pots with contact cleaner. Sounds like the preamp tubes are not getting juiced. Also check and clean the input jack. Maybe a bad preamp tube? Just guesses.