Screen is dark after replacement and face id not working

Question

iPhone 12

Apple's mainstream 2020 iPhone was released October 23rd and comes with a 6.1" OLED display, a dual 12 MP camera system, and in five available colors. Successor to the iPhone 11.

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Ashton Grabow @ashtongrabow

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Gepost: 29 okt. 2022

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Screen is dark after replacement and face id not working

I replaced the OLED on my iPhone 12 and the screen is super dim and i am unable to adjust it to be brighter it is just stuck. the face id has also stopped working. what do i do here? is there something i can fix without costing me a lot of money?

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daniel @tech_ni Rep: 34,2k 10 22 44 · Answer 1 · 2022-10-29T20:29:21-07:00

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daniel @tech_ni

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Gepost: 29 okt. 2022

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when you swapped the flex over from the old screen to the new screen was there anything covering the front lens on the back of the new screen

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[deleted] Rep: 529 9 8 13 · Answer 2 · 2022-10-30T11:20:37-07:00

[deleted]

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Gepost: 30 okt. 2022

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It’s your ear speaker ribbon causing the problem. I’ve just had one with exactly the same issue. Disconnect the battery first. Then disconnect the ear speaker and screen ribbons again. Reseat everything then see if it works.

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