My X1 PJ is making a buzzing sound when it is off. The rocker switch is off too. I am thinking it might have something to do with the fact that my power outlets do not seem to be grounded properly. I opened an outlet up to test it. My understanding is if the outlet is ground properly I should get a reading by touching the ground wire and one of the power wires. Well I do not get a reading when I do that. Do you guys think having the X1 plugged into a non-grounded outlet would cause the buzzing?