Lexmark x658 BSOD 900.30 Firmware Error gui_app 0000-0000

[Codex]

Hello Guys

We have a Lexmark with an 900.30 Firmware Error gui_app 0000-0000 error code, i tried to disconnect the lan, checked the fax option and trying to enter the service mode, but nothing. I cant do a firmware update because the macine is stuck in the BSOD and i can't connect via web browser or ftp....

[subaro]

turn off machine. while pressing 2 7 8 keys, turn on the machine and wait till boot up. use firmware with usb stick and update firmware.

[Codex]

Hello Subaro... I'll tried with the 278 keys but nothing happens.... Still 900.30 appears