My Portuguese is terrible, but my Google Translator is a lot better.
Do You have ADB established in your PC's system path. Do you know how to run shell commands thru ADB to your Phone.
This is not going to be easy. It looks like the Firmware was bad. Let me know what you have installed on you PC.
Put your phone into download mode if you have ADB established already and tell me if your phone is recognized by the LG USB Drivers for your phone.