- Forum: Plasma Flat Panel Displays
i have a noticeable buzzing noise that seems to be coming from the top right hand corner fan in the back. (65GT30) gets louder as the TV gets brighter. i also had an issue that i was troubleshooting (turned out to be a bad HDMI cable) and tried other inputs and noticed a huge drop in picture quality especially in the blacks (graininess and what looked like squiggles, for lack of a better term). realized that picture settings were on standard and not my usual custom setting.