Also, here is a better description of the problem. TV will power up normally. Picture is excellent. After about 10 minutes of running the picture will "freeze" for a split second, program sound stops, and then the picture is completely gone...just like the TV has been turned off. However, the red power light on the TV remains on. A few seconds the picture and sound returns...picture is normal. A few minutes later it will crash again.
I tried running the set directly from the wall socket (and a different outlet too), but same results. When the set is crashing, the remote "power off" button will not turn the TV off. The remote off button only works when picture returns. Also, when the picture drops (crashing) I here a click just like when the set is turned off or on.