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backlight works but no picture no sound

Funai 32” Led tv LF320FX4 has backlight working but no picture or sound. It has vertical lines on the screen. The connecting ribbons and power supply and mainboard look in good condition.

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The main board is most likely faulty. I would recommend you try and find a working replacement and see if that fixes the issue.

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Is there any other way to determine if the main board is the problem

Try in in another working T.V. or try and get a replacement one and see if that fixes the issue

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Balaji Kumaresan Ganesan 将永远感激不已
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