The flashing LED indicates excess current is being drawn by the processor. This can be related to damaged I/O pins or power supplies that are not well regulated..
Gerald On Thu, Jun 11, 2015 at 4:38 PM, <[email protected]> wrote: > I have the same issue, already 3 boards has died. > any solution, i tried to use optoisolator/pwm and noting. the BBB is a bad > board. > > > > Le mercredi 25 février 2015 18:03:24 UTC+1, [email protected] a écrit : >> >> 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]. > For more options, visit https://groups.google.com/d/optout. > -- Gerald [email protected] http://beagleboard.org/ -- 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.
