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Backlight and sound working but no picture.

I have the Sharp LC-50LD266K TV and have tested the power board and all is good. I thought the no picture may have been the T-Con board as the output reading were close to zero when plugged into the two ribbons.

I bought a new T-Con board and replaced the old. Before putting the output ribbons onto the board I tested the output and it showed proper voltages. When I replaced the ribbons and re-tested the voltages went back to zero, even on the new board.

I removed the ribbons again and voltage went back up again and even checked the old board and this showed the same symptoms.

What could be causing the voltage to drop when the ribbons are plugged into the output of the t-con board?

Any questions please ask and many thanks in advance for your assistance :-)

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@gingerwinger you tested what voltages on where? what were the readings? Why did you check the voltages on the points where you measured? Post some images of your boards and where you measure the voltages. Use this guide Adding images to an existing question


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1 Answer

Chosen Solution

@oldturkey03 found out what the problem was. The LCD had shorted by one of the cables to driver board and melted the lcd and cable. You couldn't see it whilst it was in the casing. Wish I'd stripped it down now before buying 2 new boards. Never mind it's a learning curve and loving trying to work out what's wrong.

Thank you so much for your response, very kind of you.

Take care

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@gingerwinger great that you found the problem. It's always better to tear a device down ......;-)


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Dan will be eternally grateful.
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