5 blinks, won't boot.
I just flashed a CM nightly. When it rebooted, it powered off and now the notification light just blinks 5 times when I try to boot into ANYTHING.
EDIT: Sorry, I guess I just freaked out. The 5 blinks, from what I can tell, mean that the device doesn't have enough power to boot safely. It's a feature
Phone: Verizon Samsung Galaxy SIII - Unlocked Bootloader
Tablet: Google Nexus 7 (2013) 32GB Wifi-only - Unlocked Bootloader.
Previous Phone: Xperia Play (R800x) - Unlocked Bootloader
Previous Tablet: Google Nexus 7 32GB Wifi-Only - Unlocked Bootloader, bad screen. Somehow, I managed to not take care of this device very well.