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2017年4月に発売されたSamsungの大型版フラグシップモデルGalaxy S8+です。

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changed the screen of samsung s8+ but the phone isn't turning on

the phone was in a bad condition when I got it (smashed screen) so I decided to change the screen + the frame, ordered service pack and I got finished to move every component to the new frame.

however, the phone is still not turning on.

when I plug it to the battery, it vibrate once. still nothing. when I plug it to my computer it wont recognize it.

I struggled a bit with the vibrator motor when I took it off from the smashed screen… maybe it’s faking the vibrate and I need to change the battery?

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Do you have the wireless charging coil installed? This is part of the black plastic mid frame that clips into the metal housing and on top of logic board.

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I do, I thought that was the problem so I installed it but it's still doing the same weird vibration and not turning on

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It’s either that the battery is screwed and needs replacing, when you were replacing the screen you may of damaged the main circut board, or that the previous owner has done something to the phone that has caused such damage to occur. that’s either caused by an extreme impact or some accident that has something to do with liquid as damage can compromise the waterproofing.

I hope this is helpful! :-)

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I'm planning to change the battery and update if there's any change

If it's not helping, I can assume the board is damaged?

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@tom9 yep, if it doesn't show any sign of life after replacing the battery, there may be either something wrong with the circut board or a critical piece of hardware has failed

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@tom9 always have a plan when trying to repair devices you have no history on. Something Like the Samsung flowchart would be a good way to start. That way your troubleshooting is organized and not all over the place :-)

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Right above U7002

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Tom Doe さん、ありがとうございました!
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