The flashing LED indicates that the PMIC is shutting down due to a excess amount of current on power up. Sitting here, I can't recommend a fix as I would need to look at the board to understand the issue. This is not an issue I have run into before.
You could try running it off the DC jack and see what happens there. Gerald From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On Behalf Of Ahmad Fatehi Sent: Monday, October 9, 2017 6:39 AM To: BeagleBoard <beagleboard@googlegroups.com> Subject: [beagleboard] Re: My BBB doesn't turn on when connecting usb No one to reply??!! On Sunday, October 8, 2017 at 9:27:30 AM UTC+2, Ahmad Fatehi wrote: Hello, I used my beaglebone black for a while with usb power. Once I decide to test it with battery and switched it on with a Li-Ion battery and it switched on.But after that when I connect usb to board it doesn't power up and led power blinks! and to run board I first should connect battery to it and it powers up and then I disconnect battery and it continues to run without battery and through usb! How can I solve this problem so that it can run without need to connect battery!? -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com<mailto:beagleboard+unsubscr...@googlegroups.com>. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/c0063923-c73a-4874-8472-f83ff5131b2d%40googlegroups.com<https://groups.google.com/d/msgid/beagleboard/c0063923-c73a-4874-8472-f83ff5131b2d%40googlegroups.com?utm_medium=email&utm_source=footer>. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/adf0cfd4b6134aebaeca3ade9495736d%40winhexbeus11.winus.mail. For more options, visit https://groups.google.com/d/optout.