I am suffering the same symptoms after an upgrade from 5.00 up49 3278 (64-bit kernel). Ran (and am currently running on) from usb-stick and tested everything working ok. Did the software update installer without any errors. After reboot nothing but a blinking cursor. My hardware is an Intel SSR212CC chassis. Rebooted came back up on the usb-stick working AOK in eval mode. Rebooted and tried update again error message 1229 Contact Support. Rebooed again from the usb-stick working AOK. HELP!!!

Thanks,
Tracy