My Rev C BBB purchased from Adafruit just died on my in the exact same way. I can't get it to boot at all whether connected to USB or 5V power supply.
On Wednesday, February 25, 2015 at 2:02:07 PM UTC-5, Mike Traynor wrote: > > Thx. Will try another PS if I can find one. Otherwise will have to stick > with USB for now. M. > > On Wed, Feb 25, 2015 at 9:07 AM, Gerald Coley <[email protected] > <javascript:>> wrote: > >> I have seen this before. The USB path and 5VDC paths are different >> through the PMIC. It is possible that the PMIC has sustained some damage or >> it could be the 5VDC power supply is not powering up properly, where it has >> a voltage spike, causing the PMIC to shutdown. >> >> Past performance of power supplies is no guarantee of future performance. >> It could be right on the edge. >> >> Gerald >> >> On Wed, Feb 25, 2015 at 10:27 AM, <[email protected] <javascript:>> >> wrote: >> >>> Identical problem this morning: BBB boots fine when powered by USB, but >>> not when powered by a 2.0 mA rated 5.0 V DC power supply (nicked from some >>> other device). BBB power LED blinks continuously. This power supply has >>> worked with this BBB in the past. >>> >>> Mike. >>> >>> >>> On Friday, January 23, 2015 at 8:44:59 PM UTC-8, [email protected] >>> wrote: >>>> >>>> I had a similar problem- my power LED would just continue blinking when >>>> connected to a 5V power source. This meant there was something wrong. >>>> First, I checked if my BBB was still alive. To find that, I connected my >>>> board to a computer via USB. Surprisingly, this time power LED turned on >>>> normally. Then to make sure that everything was properly, I ran some >>>> program as given in the BB website http://beagleboard. >>>> org/getting-started. I was happy to see, the programs on the website >>>> worked just fine on my board. Thus, I was able to conclude that strangely, >>>> my BBB board didn't like 5V external power source! >>>> >>>> On Friday, November 22, 2013 at 6:41:41 AM UTC-8, Bert Lindner wrote: >>>>> >>>>> >>>>> Just had a 5V powered Beaglebone Black seemingly die on me. First the >>>>> power led kept blinking, then after removing the (BB Toys CAN) cape the >>>>> power led would flash just once after applying power. Looking back in >>>>> previous threads this seemed to mean I killed the board somehow; there >>>>> was >>>>> also a GPS module attached to one of the UARTs and a probably power >>>>> hungry >>>>> USB wlan stick that I'm trying to get to work, so a power hungry setup. >>>>> >>>>> I was ready to declare it dead, it remained just flashing once after >>>>> repeatedly unplugging and reattaching the power supply. >>>>> >>>>> However I noticed the single power led flash would also happen if I >>>>> pressed the power button (leaving the 5V plug in). Doing that repeatedly >>>>> seems to have revived the board, will see if new problems occur. For now >>>>> it >>>>> behaves normally. >>>>> >>>>> Is this expected behaviour? >>>>> >>>>> Best, >>>>> >>>>> -Bert >>>>> >>>>> -- >>> 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] <javascript:>. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> >> >> -- >> Gerald >> >> [email protected] <javascript:> >> http://beagleboard.org/ >> http://circuitco.com/support/ >> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to a topic in the >> Google Groups "BeagleBoard" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/beagleboard/jBFshjlPeHI/unsubscribe. >> To unsubscribe from this group and all its topics, send an email to >> [email protected] <javascript:>. >> 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
