I searched but didnt find anything related to mine...i have a 300 watt inverter plugged into the outlet by the passengers left leg in the center console and the playstation hooked into that using its normal plug. The ps2 is hooked into the av2 input on the avic-d3. With the ps2 off there is no buzzing sound through the head unit but when turned on its there. I have no static lines on the screen, picture is clean, just that annoying sound. Also it goes up and down in loudness when adjusting the volume on the headunit. Is there some kind of isolator that i can put in or other solution? Thanks in advance.

You should try to use a better ground than the cigarette lighter.