Same problem here, its showing up in 2 ways. The Beagle Board Black has a power control IC that is sensitive to 5 volt rise time and has frozen up under short brownout situations..in fact, I can freeze it up at will by dropping out 5 V for about 100mS, it will lock up with 3.3 volts turned off even though the 5 volt input is good. Removing the 5 volt input for more than 1 second restores normal 3.3 Volt power and all is good. The other way..I'm still investigating, it refuses to boot about 1 in 20 tries for reasons that are so far unknown. In this instance I have power supply monitoring instruments all over this board, and the power supply controller is working even when the lockup occurs. So I'm mainly interested in the situation where the blue lights are on but the board is not booting. We are running a port of Debian Linux.
On Wednesday, July 31, 2013 5:48:54 PM UTC-4, [email protected] wrote: > > Hi guys, > > we have a problem with our Beagle Bone Black (A5C). We are using Ubuntu > Raring 13.04 armhf v3.8.13-bone21 (2013-06-14) on the eMMC (no SD Card). > The Beagle Bone is placed in a case and we have connected it to a DC power > supply. Sometimes (I would say every 5 to 10 times), when we are plugging > in our power supply, the BeagleBone powers on (Power LED is on), but > nothing more happens (none of the other four LEDs is on). If we are now > removing the power supply and putting it in again, the BBB starts normally. > I guess the power supply is strong enough: 5A@5V. > > Thanks for your help in advance. > > Regards, > duckhunter > -- 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 [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
