HI.
I had the problem of screen flicker when I replaced the screen on my tablet pro 4 with the spare part sold by ifixit. I finally had to opt for the Surface Pro 5 screen, which is compatible. You'll find my commentary on this subject here, which you might find useful:
https://fr.ifixit.com/R%C3%A9ponses/Afficher/802685/Screen+replacement+of+Surface+Pro+4+with+a+Surface+Pro+5+screen