Just today for the first time my nook tablet shutdown during the night while asleep. Now whenever i reboot it gets into the loader, loads the internal eMMC then reboots. I can get into recovery fine but when i formatted then reflashed the .02 update it still happens.
I am on vacation and i need to use this tablet for some work, anyone knows what's wrong with it
I have had exactly this issue (and it's just happened again actually), and I found the following method successfully restored to 1.4.0 and allowed me to start over and flash 0.02.
http://xdaforums.com/showthread.php?t=1470910