OK

i have a BW 3.5'' Composite Display variant 4. It had a lot of noise on the screen,so i took apart my build about 6 times to see what the problem was after attempted fixes

. I..... don't ask me why i just did it.

I connected the ground to my video source. A little half loop the yellow to the black turned it on and eureka it cured it no more noise nice clear screen. I hope this helps someone i"m so happy rite now you guys have no idea . I can show my build without embarrassment.

video to come soon.