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I have seen the reboot loop (as I call it, heh) caused by bad ballasts, and also by bad color wheels. Usually not a broken color wheel, as I mentioned earlier, most Samsungs color wheel bearings get sloppy and the wheel contacts the edge and breaks. It still spins the hub and "thinks" it's working, and plays a BW picture. The "bad" color wheel I am taking about is something in the speed sensing circuit (I guess). It doesn't "see" it or cant control it or something. I have randomly thrown a new color wheel in a "rebooter" and had that fix the problem.
I agree though, not worth the aggravation. I Just tossed 4 of these that needed color wheels (broken wheels). I can't sell the complete working TV for what a color wheel costs.
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