LED Blink Codes

I am trying to find a document describing LED blink codes. There does not appear to be a section in the official manual. I figured out, with the help of Google, that Knight Rider pattern means eMMC is flashing.

Does anybody know what it means when all 4 LEDs are blinking: blink, blink, pause, blink blink, etc.

heartbeat | mmc0 | cpu0 | mmc1


Yes, those are individual LED designations. What does it mean when they all blink at the same time, in unison?

If you were “flashing” the eMMC, it means, ERROR… attache your serial log and we can figure out what went wrong…