50 inch keep tuning picture off but there's sound

my 50 inch keep tuning picture off but there's sound is on, any idea how to fix it please ?

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Hi,

What is the model number of the TV?

Try shining a torch at an angle close to the screen and check if there are images when the TV is on with sound only. They will be very faint if they are there at all, so trying this in a darkened room may help to see them.

If they are there then there is a backlight problem with the screen.

Does the picture come back by itself?

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