Thanks for the help, my m8 is already running, I was able to make it work, one of the problems was that doing the fastboot devices on the adb cmd and the device wasn't there, as son as the device serial appear I have flashed the twrp again downloaded the viper rom and it's working again, I have a rooted m8 but still s-on the only thing I don't understand is why the phone just block on the boot and stays there on an official rom update, it was painful thinking that the phone was useless
Thanks anyway for the advices, probably useful on future problems :good:
Thanks anyway for the advices, probably useful on future problems :good: