Whenever I plug my phone into the charger, a few seconds later it makes a popping noise and shuts off completely. Then it restarts and the Motorola logo appears on the screen, but then it goes black again, restarts until the logo appears on the screen, then shuts off again. It continually does this whenever it is is plugged into the charger, and I cannot turn it on when it is plugged in either. Any help appreciated.