Does not sound like the old "BAD CAPS" issue. There may be one or two boards. Get prices, is it worth it?
I have a Samsung LN32C530F1FXZA. When I turn on and watch the TV, eventually it goes through repeated restarts.
There are some things I have noticed.
1. If it is unplugged for a few days, the problem will not occur for a day.
2. If it is unplugged for a few weeks, it does not have restart issues for several weeks.
3. I think I have noticed the restarts occur more often the more "active" the show I am watching.
Once the restart issue occurs, it will continue until I unplug it for a long time. Switching it off does not help.
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