I have got the same problem after hitting the hibernate option.Everything else was working just fine before that. Let me know how your problem is being solved. By the way when you used the Golden Dingo software option, did you see the "Updating Software" message or did it still show the white screen? If it was still the white screen how do you the downgrade worked?

EDIT: I copied the update.zip folder to a USB key (placed it in the root directory as required. There other files too but that should not matter, right?) and followed the instructions. All I see is the white screen and some music being played in the background (this wasn't happening before) but I still see no "Updating Software" message.