I plug in my electric guitar to the amp, and it makes this super loud buzzing noise. I can't even play the guitar. I was fine a day before. I tried plugging in my dad's guitar, and it works fine; so it must be something wrong with my guitar. Any ideas?
Check the wiring connections - starting with the output jack. You probably have a loose or broken wire connection somewhere. That will definitely create such noises.
"Maybe this world is another planet's hell?" - Aldous Huxley