Electric Guitar Fret Buzzing

Electric-Acoustic guitar buzz when I hit one ?!?!?! A chord power HELP!?
This is NOT FRET BUZZ. The buzz seems to be entering at somewhere around the action back, or something, maybe the internals of the guitar?!?! I do not know what it is, and it does not happen in every note that I play only one A in general, its almost beat me a likem One is the resonant frequency of a part inside or something, and ideas?
I'm assuming that if you know the strings are not hitting the fret board, then you also know when to change your strings. If you only hear the sound when you playing it through an amplifier, then it is probably the electronics. If you hear all the time is probably the "hardware" so to speak. Unless you recently bought, I'd take the guitar for technical assistance. Any music store will be able to tell you one place you can go if they do not do it themselves. You can get a quote on how much it will cost before you do anything, but it is something simple that should be below $ 50. Most guitars need this from time to time.
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