Ajtmex

Hey guys. I'm new to the forum. Long story short, my dad bought the PM Ultra 5.1 a few years ago and I got it after he passed, but before that, had stopped using it because of this buzz, and I figured maybe you guys could help. After looking through the forums for an existing thread, I could only find ones about humming and such. But anyways, onto the problem. When I turn it on, there is a very loud buzzing that occurs when you turn it on, kinda like when you cross leads accidentally and it starts to short. The volume doesn't do anything, so it can't be an input. When you switch to headphones, the sound then comes from inside the circuit board somewhere. Any ideas what the problem might be?