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Hi, It seems back light inverter board is not producing voltages to lit the back light inside lcd panel to show the picture on lcd screen. Please replace back light inverter board to get tv fixed. Local tech will help you if you are not familiar with tv repair. Thanks.
Ok, easy !!!.( take it out the box ) Look, in the front part of the box TV ( under convergence panel controls) you will see a little black box, we call high voltages splitter ( 5 red wires go to pictures tubes and screen focus box). Replaced it. Am suggested inspected for possible leak coolant, just for be sure noy leak coolant projection and prevent future problems. I hope this help you, Thank you !!!
It sounds like the circuit board is arching over somewhere. It could be as simply as cleaning and digging out the carbon mark to stop the arching. This is most likely the screen or focus voltage causing this, if there are no parts that have broken down. This will damage the printed circuit board and make things worse the more you let this cook. This could be dangerous for you to mess with because of the high voltage present, so my best advise would be to get this into the repair shop as soon as possible before this board burns up. It should not cost all that much if the CRT board can be repaired. Good Luck
If you had a burning smell, well the board is toast. These sets are made to replace the entire board at one time. Before installing the replacement module, the picture tube should be checked. A defective picture tube ( such as a G1 short) may cause a failure in the power supply section.