Originally Posted by bawlz mcnutt
Do a "Factory Hard Reset" hold the Volume Down + Power buttons when powering on the device and you'll get the Factory Hard Reset prompt.
Since you don't have CWM installed pressing the power button twice at this point will do a factory reset.
I believe you will lose any changes you've made to the phone since you got it, but I would imagine that is preferable to a non-working phone.
Ive done that and it didnt work, I went to a repair store and they told me it was a system failure, before that, I went to a corporate store and they ordered another device, (It sucks cause its gunna be reconstucted and I bought mine new) :/