I have owned my G68ADV for probably 5-6 years with absolutely zero issues. Recently, upon switching inputs, there was a loud noise which I can best describe as feedback coming from the speakers, lasting only a half second. The other night, it became much worse, having an almost pulsing character and probably close to 100dB in intensity and lasting until I muted the processor. It seems like a power issue and I've read that the power supplies don't last forever. Is there anything else that I can rule out before sending it away? Also, I remember reading about someone in the states who was doing repairs and had a much better turn around time than the factory.

Any help or insight would be appreciated.
Rudy

G68ADV, DSP5500's, DSP5500HC, DSP5000's, Sony Ruby, DVDO, VP-30