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S5 Black screen+blue light+vibrate

I have a Galaxy S5 that doesn't really turn on. When you press the power button a blue light pulses on the top left corner of the screen, and it starts quietly vibrating every 10 seconds or so.

I have tried taking out the battery, and holding down the power button and that didn't work. I have tried doing that and then plugging it in letting it fully charge, but it still does the same thing. I have tried pressing the power and volume down button, and that doesn't do anything either.

Any suggestions as to what could fix it? Thanks!

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Try press homebutton+powerbutton+volume down... maybe come download mode and you can try flash firmware... when not come is some hardware problem...

由完成的

Yeah, at this point I'm thinking the screen needs to be replaced.

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