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Turn tv on and it immediate shows the screen and then nothing. It remains power on but no picture no sound no nothing. Turn off and try again, turns on then goes dark nothing.
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I would start with checking the power supply 12vdc output, make sure it is stable with no ripple. If the power supply checks out fine, I would then suspect the main board.
Check and make sure your fans are working and there is sufficiant cooling to the back of the set. Sounds like it is overheating and going into protection mode.
Now,hook ur tv Air broscasting incommig tv signal.Give it power.Now,tv turn on have picture flashes few sec. than dies just have only sound left?Yes,than the long LCD inverter board is dead.The long LCD inverter board,help the LCD screen to get a baklight to get a picture.Tries websites like shopjimmy.com,Ebay,com to buy a refurbish LCD inverter board for the replacement.
Sounds like the CRTs are going into protective blanking due to the vertical output ic needing to be resolderd. Try resoldering the vertical IC that may possibly fix the issue.
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