I haven't experienced that on my 6070....yet.
I guess the first step is to try to get it repaired. It might be something fairly simple.
I've been very pleased with my 6070. Its a bit over 4 years old but I probably have double the amount of normal usage on it.
Samsung 64F8500, Panasonic 65VT50, Oppo 95, Tivo Roamio for OTA, Dish VIP722, Marantz AV8801 preamp, Rotel Amps, Atlantic Tech 8200 speakers, Seaton Submersive HP, Calman 5, Chromapure, Accupel DVG-5000, VideoForge HDMI II, i1Display3pro, i1pro2, eecolor colorbox.