Thank to all. and thank to wieczyste_chipy I have understand, that i have to change the firmware on the eeprom 25q64, i use a soldering remove eeprom ,with a eeprom programmer i write on the eeprom older firmware max version 3.00.01.19, and i solder again the eprom on the motherboard, after, with crum, serials, and older firmware i can ask here the firmware for the unlock solution Please, i need a secure link to download secure firmware V3.00.01.19 or 18,for SCX 3405 W, after i find the programmer and on the old chip with the programmer i downgrade the firmware, i ask if this steep by steep is ok, , if is ok, give me the time for to find a eeprom programmer, a secure link for download old firmware, and i make the work, finished i return here for to ask and pay the firmware unlock solution.. thank to all dema Santo Domingo Dominican Republic Yes, exactly. W25Q64FV file with v19 firmware SCX-3405 (not in the 3405W FN FW) in the Annex.