DC power jack boot issue

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1

If I understand your set up, I had the exact same issue with booting from a SD Card from 5V on the VDD line ( power input ). It worked great on USB and failed with 5V power source.

So for me, I swapped the SD Card from my BB and the BBB, both known good cards, the issue went away.

All I can assume is that the SD Card that I used for the BBB was not liking that “flavor” of power. The BB had no issues with the same card!

I now have the Beagle Board Black ( BBB ) working with the 32G card that was in the Beagle Board ( BB ) and all is well. SD Cards are like that…

One more NOTE: The “Bad” SD in the BBB failed over long time periods, not right at the first boot many times. Now the system works for days.

e.m.g.

2

Make sure you 5VDC supply is really 5V after it is plugged in and that it is not a switching power supply which can be noisy…

Gerald

3

If you have an oscilloscope or multimeter, it's worthwhile to take a
look at the 5V voltage. I tested a few usb power supplies and it's all
over the place, the swing in voltage while on/off load, some have as
much as 7 or 8V, no real regulation, noisy, etc... off-load can be
understandable with cheap switching mode supplies, but the other defects
are inexcusable.

cheers,
Nuno