Unhappy [Q] [HELP] LG ku3700 stuck and keeps restarting

Hey guys, i'm kinda new in these things. I've got LG-ku3700.
It is stuck and wont turn on. While turning on it shows LG logo, freezes for a while and restarts.
I tried hard reset but nothing happens, used the keys to reset but seems like the phone's not taking it.
Keeps on restarting. I pulled out battery and connected via usb to my pc, same thing happens again.
What and how do i do to make it normal again????
Thank you!!!!