Help - W8970v1 stuck after flashing

Hi all, I followed slavishly the procedure described in this post ( After final reboot, the device doesn't respond anymore. It's looks stuck with only power led powered on. I tried reset procedure (pressing reset button10 second, 40 second, tried failsafe mode with wps button); none of these worked despite my net card has Have you any idea how to solve this?

Thanks in advance.

Help! Thanks