Screen flickering on replacement screen (original work fine)

While looking into answers on ifixit i found this video : https://youtu.be/m8bLkwm9hJc in this post : iPhone 6 - irregular backlight flickering

It shows the same problem i am having with a few differences.

1. it happens all the time, no 50/50 chance of it happening like the guy in the other post said.

2. it does not happen with the original cracked screen, with it all is working fine.

i have changed the battery and have tried with 5 different screens, all have the same problem, some flicker more than others though. what is strange to me is that whenever i change back to the original screen there is no problems.

anyone know what is up with this ?

Answered! View the answer I have this problem too

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i have now tried several screens. with one of the replacement screens it works 4/5 time i wake the screen, the 5th it will flicker like with the others. so i tried to use another broken screen i had, this one is apple original, no problems with it either. so it appears that for some reason this phone reject any non apple screen !?

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I'm not sure why it's not happening with the original screen and it's happening with the other new screens, but it does sound like a backlight coil or a backlight diode or the backlight IC is going out, does it make a difference if you go into settings and turn the brightness of your screen up?

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I dont think i will be able to change these, as i understand this requires microsoldering which i have yet to learn.

was hoping there would be something i could do without it, since it work perfect with the original screen 100% of the time, so if anyone could shine some light on why this happens it would be much appreciated.

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