After approximately 20 minutes there is a loud electrical sound and the TV blanks out. At the same time the green power on light goes out and then after 5 seconds goes on again. The screen works for about 5 seconds and then blanks out again with the same loud electrical noise. This sequence will continue if left alone. If the electrical power is disconnected for about 30 minutes the TV will work again but then the whole sequence starts again after around 30 minutes.
The power supply board is dead.Those high voltage transformers on the power supply board,one those power coil have a short in it,that why it cause this shutdown a have a loud electrical current noises.Tries websites like Shopjimmy.com.Ebay.com to buy a new refurbish power supply board for the replacement,should solved this loud electrical noises shutdown to tv.
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