Chosen Solution
has anyone had this issues with purchasing an aftermarket LCD, and the auto brightness no longer functions? when returning the front assembly ribbon to the OEM it works just fine, will not work in the new LCD. have tried a few different vendors to no avail. is this a common issue with the iphone 8,8plus and 10 with the newer sw? or potentially the glass?
So after extensive research and evaluations, here is your answer. When you change out the LCM on an iPhone 8, you lose both the true tone and autobrightness features on the phone. The ambient light sensor becomes disabled. The proximity sensor and cameras will work properly, but the other functions are no longer operational. Apple has done it again.
Brightness sensor is wired with the camera, not your LCD, however, where the sensor sit behind the LCD could be covered with a little sticker that’s preventing the sensor from seeing light, see if its transparent behind the LCD, if not, see if you popped the sensor out by accident or stripped the wires. Look online for images of what the sensor looks like, good luck.
Update your device system to the latest iOS 12, this issue has been solved by the iOS 12.
If you replace iPhone 8, 8 plus or X screen you need to copy the firmware data of the original screen into the new screen. The needed tool is under development. I saw some working versions, what are tested and working with IOS 11.4 and 12.0 Beta. The screen data can be cloned only to OEM screens for now. Afte the copy of the data, the light sensor works well again. If you would like to know more about this problem read this article: http://www.futuresupplier.com/blog/solve… Working ALS Box: http://www.futuresupplier.com/iphone-8-8…
