I have a Vu 55inch Android Tv that I got in 2019 and it was working fine. 4-5 Months ago a white line appeared below the top of monitor ( like 2-3 inches below the bezels where tv channel logos usually are ). I ignored it but now the screen jitters. The jittering causes a 1-2 second of the screen texts and stuff being blurred and then going back to normal for 1-2 seconds and it keeps happening such. This is also happening when the Tv is booting up . It happens even in the android home screen without any set-top box attached. I have tried resetting the Tv but it hasn't helped it and I think it is something with the hardware.

What are the things that I can try ? I will call the Vu support tomorrow when they are open.