I got the red blinking reset to work. Not sure what I did different. Not normal screen but emergency reboot. Saw on Developer web pages NAND1 and NAND2 are alternate memories on the STB, not portals like DHCP. NAND1 was default so chose NAND2. It did auto upgrade right away, rebooted and came back with the normal menu screen. Now wondering if NAND1 is still corrupted, and how to fix it.