Info Xoom 2 ME - MZ607, Help, restore CID from Fastboot

Hi everyone, i have a Xoom 2 ME bricked and starts only fastboot mode. Ive tried to restore with RSD Lite, but the "boot_signed" file gives a error, "preflash validation failed". Ive also tried to restore it with the commands directly and all files gives ok least "boot_signed" (Only fastboot european roms).
Is it possible flash fake_cid file through the fastboot? Ive tried and it gives me a error, "command restricted" and with allow-mbmloader-flashing-mbm.bin dont work.