Why wont open my lg g3 ?

34523623

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I have updated my Android system version 5 to 6.0 marshmallow.
now I try hard reset and my lg g3 wont open,its stay on startup screen.
what can i do?
 

B. Diddy

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Welcome to Android Central! Was this an official over-the-air system update, or did you download it manually from somewhere on the web?
 

34523623

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I contacted them and they told me that the problem is likely a motherboard, also said that the board be replaced.

You would think that the problem is caused by the android system was changed by me to android marshmallow 6.0?
is it really damaging for motherboard?
 

B. Diddy

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I'd guess that there was a problem with the firmware file you used to update the phone. Are you absolutely certain it was for your exact variant? If, for example, you have an AT&T variant, and the firmware was for the Verizon variant, that might cause significant problems.
 

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No,already no,because the problem is fixed,My LG G3 back,its working and also i think i dont have a right to send my phone to LG.
the motherboard changed with guarantee and the problem is solved now. and they also change my battery.

Does anyone know where i can get update my Android Version 5 to 6?