Terrible Buzz Noise, Don't Know What To Do!!!!!!!

[MusicManDude]

Okay, so I have a Fender combo amp and a Epiphone semi hollow guitar I play on every so often. The problem is that I will go to plug in the guitar, turn on the amp, and I get this terrible buzz when I'm not touching any metal part of the guitar. So I suspected a grounding problem. I suspected it to maybe be that the outlet does not support grounding but I use my music man bass and mesa boogie on it and it works fine, no noise problems. I bought an EBtech Hum Eliminator to stop what ever may be the cause and it actually makes a stronger buzz noise. I thought it could be cable problems a couple times so I used three different mogami cables, a planet waves cable, and a live wire. That didn't help at all. So I don't know if maybe a ground wire in the guitar might be loose causing the problem or maybe a loose wire in the fender combo amp. That same buzz noise occurs even when I don't have the guitar plugged in, just with a wire connected to the amp. Would buying a noise suppressor pedal or a noise gate be the fix for the problem? or should I take the amp and guitar to a repair shop? Any input would be appreciated, Thank you.

[Ayce]

My guess would be a bad ground on the amp input. I had that happen on a Peavey Rage 15 I found. A soon as I turned it on, it hummed. Turned out the plastic nut on the input was missing. Replaced that and bingo, nice working amp for free. Check all any and all nuts on the outside of the amp, including those behind the knobs. If it has a metal face, everything grounds through it, usually.
If the hum stops when you touch a metal part, it's definately a ground issue.
Hope that helps.