My phone would not reboot. What do I do?

[AC Question]

I have a Samsung galaxy s3 sprint phone and for some reason it would not boot but will charge sometimes. What can I do to fix my phone? I have no idea on what I can do. I have charged it and I have tried changing batteries nothing is working.

 

[B. Diddy]

Welcome to Android Central! Does it simply not turn on at all? Have you tried holding the Power button down for at least 10 seconds? If nothing happens, then it could be a problem with the Power button, or worse yet, a motherboard issue. You'd have to bring it to a repair shop.