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I do not have a schmatic but if there is no picture (no Backlight) ther is a standard fault where the high voltage ossilater fails . there are 2 transistors on the main board ( looking from the back, on the right , that fail. farley easy to measure mine went both short circuit.
tricky panel to get in to and very weird transistor types.
It was over a year now and I obtained equivalents. ther are hardware improvments to the circuit around this ossilator to be found on the web.
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