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Samsung Galaxy S4はモデル番号i9505、13メガピクセルの背面カメラ、5インチ 1080ピクセルのディスプレイを備えています。

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Black screen after minor shock, power button doesn't seem to turn off

Hi All,

Just posting here in one last attempt to get this thing working without buying a new display assembly.

My brother used his phone to playfully hit a friend (who was acting dumb) on the stomach. The amount of force the phone supposedly received was probably about the same as dropping it a couple feet onto a carpeted floor. However, after this incident the LCD stopped working. It still played sounds and the capacitive touch buttons still lit up when pressed.

At first I thought it was the motherboard, since it was a refurb I had just installed to replace one damaged by rain. I sent the refurb back and bought a new one, but the problem persisted.

I've visually inspected the cables as best I can, and they seem to be fine. I don't believe the digitizer is working, since the capacitive touch buttons don't light up when you touch the screen (they're supposed to, right?). Also, when I press the power button it doesn't disable the capacitive touch buttons, which makes me think it's not shutting off (which is why I originally thought it was a motherboard problem).

It seems odd that a light tap, something much less forceful than a drop on a hard surface (even in a case), would have ruined the screen, but maybe it did. Or maybe there was some water that was in the screen and the knock moved it into a critical area.

Anybody have any ideas as to what to try before buying a new display assembly?

Thanks

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Ended up replacing the screen for $70 and it fixed the problem.

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There is a posibility that the screen connector came loose but you're probably going to need a new screen as this is usually caused by the LCD screen being broken.

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Yeah, I've reseated all the connectors already but no luck. Oh well. Went ahead and bought a new screen. This is turning into an expensive phone to maintain...

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s4's aren't cheap to replace the screen on, good luck

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Kyle Combes さん、ありがとうございました!
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