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Likely the DMD unit which is part of the light engine--if have to unplug set the microprocessor is getting scrambled and cannot operate. Common and fatal issue as to replace the light engine the cost will exceed the value of this set---DMD can be purchased alone but costs almost as much as the whole engine that comes with it.
Seen several of these sets---a shame but even at wholesale the part to fix it makes it not worth fixing.
The blinking green lite that wont go off wont allow the tv to come on. We tried resetting the tv it doesn't work Also the tv has been off for days have to unplug from wall for couple days then replug and reset. It still doesn't work. Please help.
Check the powersupply for loose solder conncetions. Especially in the protect circuit.
There is a white waffer looking IC that has been known for the pins to pop open from the
high frequency output of the power supply.
The Powersupply is on the right side and pretty easy to tell. Please use caution when
working on this set because the caps in the powersupply can hold a good charge. If you have any doubts about doing it yourself, call a professional and hopefully the pain in the pocket won't overcome the pain threshold.
I suggest unplugging your entire system for one minute to try a reset again. Sometimes a system reset doesn't take the first time. If this does no good you probably have damage to your digital board or dmd board. I have a smaller version of the same set at home and have done samsung's warranty service for several years. They deliver a great picture but do need regular maintenance and or repairs. The upside of all this is if you have homeowners insurance it may be covered, depending on your deductable amount. However, a dmd board can cost 500.00 so you may have to go that route. Hope this helps, Russmann.