Screen will not function no matter what

Question

iPhone 4S

iPhoneの5代目となるiPhone 4S。このデバイスの修理は比較的簡単で、スクリュードライバー、開口ツールと忍耐が必要です。GSM/CDMA / 16, 32, 64 GB / 白と黒

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Cheeseman93 @cheeseman93

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投稿日: 2015年8月2日

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Screen will not function no matter what

Hello, I have an iP;hone 4s that suddenly had the screen black out while being used, the vibrate still functions so I know the device still powers on. I have tried everything I have found so far, disconnect the battery for a harder reset, doing a Power + Home reset, and reconnecting the screen connectors. Nothing has worked. I even put a different screen on the phone and that did not work either. The connectors appear to be fine, no damage. Does anyone have any idea what might be wrong?

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oldturkey03 @oldturkey03 評価: 781.6千 1.1千 893 2.3千 · Answer 1 · 2015-08-02T16:40:39-07:00

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oldturkey03 @oldturkey03

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投稿日: 2015年8月2日

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Cheeseman93, could be that the actual backlight has failed. Replace the display assembly and see if that fixes it. If it does not, you will have to take a closer look at the backlight circuitry on your logicboard. It is always possible that one of the backlight filters etc. has failed.

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I think it might actually be a motherboard issue like you had said. I've done some pretty complicated repairs but reconfiguring an iphone motherboard is not one of them. I assume its more than your average soldering iron.

Cheeseman93 さんによる2015年8月2日

Just need a good microscope and a good soldering station. With a bit of practice on an old board, you can accomplish this too. I suffer from OPV (old people vision) and have the aging tremors, but still manage. Go for it...:-) Consider posting some images of your board from around the LCD connector. Lets see if we can spot something odd. Use this guide iFixitでの質問に画像を追加する方法 to add images.

oldturkey03 さんによる2015年8月2日

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