My DLP is 2 days old. Today when I turned on I noticed a buzzing sound...it's like sizzling noise coming from the speakers even when the TV volume is zero and mute....Is that a speakers problem or house power problem. btw: The tv is connected to Monster 1000 surge protector.
First, remove everything from the surge protector long enough to see if the problem goes away. If it does, then something on the surge protector needs a better ground.
If that's not it, check for other devices near the TV, like home theatre amps, etc. Remove power to them one at a time and see if the sound goes away.