My phone is not booting up after a hard rest turns off after the at the spinning gears, why?

[Windows Central Question]

my phone is not booting up after hard rest turns off after the at the spinning gears

my phone is not booting up after hard rest turns off after the at the spinning gears. when turned on it goes to the spinning gears at half of the progress line it gets switched off. Reset was done at in window 10 insider preview. mobile : Nokia lumia 630 pls help soon