...you need to use the testpoint procedure with X65Flasher software and include bootcore in the flashing process (use MS-Dos command: x65flasher /b to start). Connect testpoint, click on "Connect", disconnect testpoint (three secconds) and start flashing.... After flash you need to use papuautils with testpoint. Check only "?????? OTP", "Pause" and from Recalculate Keys keck all options (in the Flash menu). Connect testpoint, click on "Do the Job!", , short two pins from the display/keyboard connector (function power on), disconnect testpoint (you have three secconds for disconnection - see message in the right window - papua) and wait...
That is...
dagos