i think mine works now!
So I was planning on exchanging TV tomorrow. I figured the only thing I haven't done to the TV was just reset it. I unplugged everything from the TV and reset the factory options in menu. When it reset it did update the firmware. Started with my xbox and used HDMI 1 port, 1080p worked,then DVD player-worked ..then stereo system still good (i had read possible interference) last the cable box. everything is running right as of now. Try it,good luck