GoPro hero 3+ Connected to usb with 14 volts, now does nothing.

I did not have the correct cable, found a wall charger with the usb plug, connected it then noticed it was rated at 14 volts, now it does nothing, found another cable and connected it to a laptop and still does not power up, removed the battery and still no red light and no function. Does anyone know what circuit board needs replaced? And does ifixit.com offer the parts?