A need restore unit.
I don´t have a older files (MyFlashDisco) of my avic, but i downloaded a FULL EU image from ftp://www.turboss.com
i descompress to a USB drive.
Put WINCE files in a SD card and update the system.
Put in other SD TestMode v2.3 and start windows CE in my F900BT.
When the systems starts, double click in control panel and duble click in manager storage.
Format MyFlashDisk
Copy files USB drive (all) with the structure APL, APL2,APL3... to MyFlashDisk
When finalished, turn off the ignition.
while 10 seconds and turn on the ignition.
The systems not starts, but the pioneer screen apears and the system freeze.