These sets are known to have issues with the digital board. Parts can be bought from www.samsungparts.com The part isn't cheap. when it freezes up does the video stop then after so long the video goes blank then it comes back to normal. Sometimes unplugging them will make them work for a short time but after a few days to a week or so they start acting up again.
We have a big write up about this model athttp://www.hometheatershack.com/forums/s... hlr__67W are known for digital board issues. ps. The first two numbers of the model number are screen size!
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The video processor has garbage in it, and if you leave the set unplugged from the wall for 40 min., it will reset back to normal.
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