The screen is broken

My screen change colours and no one broke it or touched it

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Can you add a picture of what you're seeing on the screen? "Broken" and "change colors" don't really give us an accurate idea of what's going on with it. Could be a board problem, a backlight issue or a display problem, but it's impossible to say just from what little you've told us.

Adding images to an existing question

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I have a 65A6K

Factory model 65A51HVT

I think it’s similar model My screen is grey the backlight turns on, I can even screen share but not video, YouTube can open if I use the remote control to open the app and something plays, but overall no video at all, and the indicator blinks red constantly for a couple of seconds like 7-9 times before it stops.

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