The most common problem with those TVs is the burnout of the infamous trio of Y sustain board and buffer boards.
To test if it is them at fault you can disconnect the power to the Y sustain and try to turn the TV on.
If it comes and stays on then this is it.
For more information read
http://blog.coppelltvrepair.com/2010/10/lj92-01200a-lj41-02759a-truth-according.html
Hope this helps. If it does please rate the answer.
Feel free to contact us offline for repair of your Y sustain board.
Bobby
www.coppelltvrepair.com
I have a philips plasma and has a line down the middle what can I do or any part I can change need help thank you
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