BBB doesn't turn on

Hello, i have a problem. This morning I was working with the BBB and worked perfectly fine, I shut it down with “sudo shutdown -h now”. Later I tryed to power it again and it doesn’t power on, the led lights momentarily and then it turns off, and nothing else happens. I don’t know what to do. If any one could help me I’d appreciated it. Thanks.

start with a fresh sd card image
make sure your power source is good
if you have anything connected to the headers, remove it.
the first things i would try.

Perhaps it’s just me, but I’ve made a habit of using the 6-pin debug serial whenever I can.
(don’t drive with a bag over your head; it’s soo much better when you can see where you’re going)

Just remember to use a 3.3V Serial-to-USB adapter; otherwise you might break your BBB.
It’s running at 115200 baud.

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