Tv screen problem crosses in picture

[Matty R]

Hi can anyone tell me what is going on with my samsung tv screen plz see pics

 

 its just sarted to happen when the screen is dark in films

[Matty R]

But its happening when the film is playing you can see the pattern through the picture. I will take a look in settings. Im going to check all the hdmi leads at some point tomorrow. Thanks for the reply