Hello everyone,
I have a Beaglebone Black that will not power up. Last week it was working 
but today it appears to be completely dead. I tried using three different 
methods to power it up, USB from a PC, USB power from a USB phone charger 
that I have used in the past to power the BBB and a 3A 5V wall wart through 
the barrel jack. None of those power sources will even illuminate the power 
LED between the Ethernet jack and the barrel jack. It's as if the PMIC is 
dead or was somehow zapped. I have tried pushing and holding the power 
button but nothing. The power light does not even blink or flash. Between 
last friday and today I have not touched it though a coworker had to move 
my board to use my desk. It was not connected to any power source so it 
couldn't have been shorted. My only guess is ESD.

But the bigger problem is I have lost 4 solid days of work as it is all on 
the eMMC and I forgot to backup (my dumb fault). My only hope is if I can 
back feed the SoC power from the headers therefor bypassing the PMIC. But 
from the looks of the schematics and manual, the SoC depends on the PMIC to 
control the reset and power signals.

Am I looking at a total loss or is there any hope of powering the board or 
reading the eMMC?

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