The replacement that I got on Sept 2018 started flickering again after 5 months of use.
Posts made by norrissee
Same Screen Flicker From Replacement SP4
I received a replacement last September 2018 after I reported the screen flickering to MS support. But after 5 months of use the same flickering problem cropped up. Seems like MS is shipping us the same SP4 without any change in the hardware design to prevent the flicker (I'm assuming it's from a solder crack issue due to heat?).
So yeah, same device, same old problem.