my m8 is the international unlocked version from amazon, 2 months old.
no root, no s-off, just stock with the last update from htc (4.4.3 i think)
last night, went to sleep, and charge my phone with 20% battery, then this morning when i woke up, the phone was in this screen:
replace the .
Tried to reboot but with no luck, at the same menu i entered to hboot and some lines with "not found" (like 4-5 files) appeared on the screen, then in the new menu, i tried to enter the recovery menu, no luck and went back to fastboot menu, factory reset, no luck too.
After trying all of the menu options with no luck, i tried to use the fastboot to flash an stock image of the recovery, but always getting a signature verification failed.
Tried to flash the stock roms from here, but also the same error (signature verification failed)
So, if someone knows something to help me, please do