Hey there. Pretty sure my BeagleBone Black is dead but it would be good if 
someone could confirm. I got it in an OpenROV kit along with an arduino 
board for controlling motors and other stuff. Everything worked fine for a 
few days, but then the whole thing stopped responding. I hadn't really 
looked closely at the BBB prior to this, so I don't know if any of the LEDs 
on the board were lighting up when running but I would assume so.  Anyway 
to troubleshoot the problem I connected the BBB itself to a USB cable from 
my computer which should power the board but... nothing. No LEDs come on. 
Not even the power LED over by the 5V power supply connector (which I am 
not using). 

Is there something else I should try? Any diagnostics I could run? Or key 
points on the PCB where I should check voltage levels? I don't have the 5V 
power supply so I'm sortof stuck with USB to power the card. 

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