toshiba regza cinema series 55sv670u 55 inch 1080p lcd hdtv with led backlight and clearscan 240 bla

We have a 3 year old Toshiba 55SV670U....and it has been a terrible purchase. The backlight flickers until either part of the screen or the whole thing goes dark (not black but considerably dimmer, making watching challenging and gaming almost useless). Turning it off and turning it back on...

I have owned a Toshiba 55SV670U for a little over a year during which it has spontaneously shut down, just as if it had been powered off, numerous times. It's not a power supply issue, as the set is supported by a dual conversion UPS and there have been no power grid issues. The set always...

The screen on my Toshiba 55SV670U does not display a picture on ANY input but just vertical, random colored lines across the entire screen. I'm looking for troubleshooting advice and/or recommendations for which board is the likely culprit. Already removed/replaced all connectors to see if it...

The screen on my Toshiba 55SV670U does not display a picture on ANY input but just vertical, random colored lines across the entire screen. I'm looking for troubleshooting advice and/or recommendations for which board is the likely culprit. Already removed/replaced all connectors to see if it...

Does anyone have any clues as to where this 670U series will be on display at a Brick & Mortar Retail outlet so folks like us can perform a PQ comparison with their own two eyes? I know the Big River will have it on June 1st & probably a few other online retailers but most folks dont like...