I recently tried to update the OS on a stock Beaglebone Black. The BBB now refuses to boot off of either the eMMC or an SD card.
Booting from the eMMC lights up the power LED, no user LEDs, and outputs the character ‘C’ a bunch of times on the serial line.
Booting from the SD card, partitioned with partition 0 as fat16 via mkfs.vfat -F 16 and partition 1 as ext4 with mkfs.ext4 results in this output: http://pastebin.com/14E8AwAD
Booting from the SD card, with MLO at 128k and u-boot.img at 384k results in the same thing.
How am I able to restore the BBB to a usable system?