A schematic would be helpful/ You can send to to me direct if you like. Craters are definitely not good. It does sound like a IO stress issue. The LED acting the way it sounds means the PMIC is seeing excess current and shutting down.
Gerald On Wed, Feb 26, 2014 at 8:48 AM, <facetious....@gmail.com> wrote: > I have a device that I'm building in quantity for someone, and it has a > simple halfwave rectifier and switching reg to provide 5V to power the BBB. > They power it with 24VAC. > > I'm not sure what exactly is causing it, but they're having problems with > the BBBs dying on them. I got one back today, and I get a single quick dim > flash of the power LED if I plug in USB, or rapid flashing if I use the > barrel jack. After seeing this post, I noticed that there's a burnt crater > on the processor. > > I was originally thinking power problems, but now I'm starting to think IO > misuse. > > These boards use primarily I2C, and the BBB is driving a couple of I2C > peripherals for sensors and solenoid control. Additionally, I fanned out > eight GPIO to connectors which are for future use for PWM to run light > dimmers and switch inputs, but they're not supported yet. I just found out > that they had the PWM lines hooked up, and I don't yet know what they had > connected to them. > > > On Thursday, July 4, 2013 10:38:46 AM UTC-4, Gerald wrote: > >> You have blown the processor. Request an RMA. >> >> beagleboard.org/support/rma >> >> No fuses on the board. Plugging in the USB and DC supply is totally >> acceptable and supported. >> >> Gerald >> >> >> >> On Thu, Jul 4, 2013 at 3:21 AM, Will Kostelecky <will.ko...@gmail.com>wrote: >> >>> Help! >>> >>> My BBB was working fine, great in fact, but not so much at the moment. >>> When I plug it into a power source, be it a known good 5v supply that I >>> have been using with it for weeks, or into either of two computers via USB, >>> I get one dim little flash from the power LED and then NOTHING else. No >>> other lights flash. If I hold down the power switch I will get another >>> brief and dim flash after a couple of seconds. Again, no other LEDs light >>> and nothing else happens. >>> >>> This started to happen when I plugged the BBB into a computer using a >>> USB cable while it was still plugged into the 5V power source. Could this >>> have fried something? Are there any poly fuses that might come back to >>> life after a rest? >>> >>> Frustrating as I was making such good progress on my project! >>> >>> Will >>> >>> >>> On Tuesday, 30 April 2013 15:23:23 UTC+1, Gerald wrote: >>> >>>> You are a pioneer! Columbus was not looking for America. But you are >>>> now the Columbus of the power button! >>>> >>>> I am trying convince the SW folks to add support for the power button >>>> but it is down the list somewhere. >>>> >>>> Gerald >>>> >>>> On Tuesday, April 30, 2013, Jason Stapels wrote: >>>> >>>>> An update for the curious. After some prodding from the >>>>> all-power-Gerald, I was able to bring the board back to life again by... >>>>> are you ready... holding down the POWER button. Which means I'm probably >>>>> the biggest idiot ever!? I guess I expected the PWR led to be lit any time >>>>> 5V was feeding the board, regardless of it's On/Off state. >>>>> >>>>> Certainly, in the dozen or so previous times I plugged the board in, >>>>> just giving it power caused it to power on, so the idea of the POWER >>>>> button >>>>> actually being used to turn it on never occurred to me. If I could save >>>>> face just a little here, I did actually press it a couple times before >>>>> throwing in the towel, I just didn't consider holding it down for a few >>>>> seconds. >>>>> >>>>> In embarrassed shame, >>>>> ~ Jason >>>>> >>>>> On Tuesday, April 30, 2013 8:19:57 AM UTC-4, Jason Stapels wrote: >>>>>> >>>>>> Hi all, >>>>>> >>>>>> Just wanted to share my experience with my dead BBB. It's my first >>>>>> experience with the Beagle line so it's possible I did something wrong >>>>>> somewhere so I thought it would be a good idea to share my experiences in >>>>>> case other newb's read this. Feel free to skip to the bottom for the >>>>>> symptoms. >>>>>> >>>>>> -- Begin Background Info -- >>>>>> >>>>>> I was lucky enough to get my BBB almost right away from Digikey. I >>>>>> immediately installed the drivers on my Mac and started playing around >>>>>> with >>>>>> it the first night. Unfortunately, the second night I couldn't get my Mac >>>>>> to allocate an IP address through the USB to talk to it so I thought >>>>>> maybe >>>>>> I shouldn't have skipped that "update software" step. So next I >>>>>> downloaded >>>>>> the latest "flash eMMC" image, wrote it to an SD card and then went >>>>>> through >>>>>> the upgrade process. >>>>>> >>>>>> Here's where things went a little South. After the first attempt the >>>>>> USR lights eventually went solid (presumably indicating the flashing >>>>>> process was finished) but when I rebooted it without the SD card, the >>>>>> power >>>>>> light would come on but it wouldn't boot. After a couple repower >>>>>> attempts I >>>>>> decided to flash it again. This time, at some point during the flash >>>>>> process, the board seemed to just lose power (all the LEDs were off). >>>>>> Attempts to power the board resulted in the same as before, power light >>>>>> comes on but no booting. >>>>>> >>>>>> So, my assumption was I messed up the SD card image. I >>>>>> downloaded/reimaged the SD card again, went through the flash process and >>>>>> this time it seemed to finish. Now when I powered on the board it >>>>>> appeared >>>>>> to boot up. However, I still couldn't get it to pick up an IP address >>>>>> from >>>>>> the Mac (after reinstalling both drivers and a couple reboots). I read >>>>>> somewhere that someone had a similar issue and an update to Angstrom >>>>>> solved >>>>>> it. >>>>>> >>>>>> This time I plugged the board into my linux box and I was able to >>>>>> access the running linux image (yay!). I immediately SSH'd in, and went >>>>>> through the Angstrom upgrade (opkg update; opkg upgrade). The upgrade >>>>>> took >>>>>> awhile and seemed to have a few issues with the new kernel modules >>>>>> (/lib/modules/blah didn't exist). I figured it was just a warning and >>>>>> after >>>>>> the upgrade finished I unplugged the board and plugged it back into my >>>>>> Mac... >>>>>> >>>>>> -- End Background Info -- >>>>>> >>>>>> The power light came on... the USR lights all went solid for a couple >>>>>> seconds... and then the board died. I can no longer seem to power the >>>>>> board >>>>>> up at all. I've tried multiple USB cables, multiple USB ports on multiple >>>>>> machines, and even tried the DC jack with a 5v/2.2A supply. :( I >>>>>> submitted >>>>>> an RMA (although my board doesn't seem to have a serial number) because I >>>>>> don't think I did anything wrong, but I'm a very sad panda regardless. >>>>>> >>>>>> Any ideas? Anything I should check? >>>>>> >>>>>> ~ Jason >>>>>> >>>>> -- >>>>> 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. >>>>> For more options, visit https://groups.google.com/groups/opt_out. >>>>> >>>>> >>>>> >>>> >>>> >>>> -- >>>> Gerald >>>> >>>> ger...@beagleboard.org >>>> g-co...@ti.com >>>> http://beagleboard.org/ >>>> http://circuitco.com/support/ >>>> >>>> -- >>> 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...@googlegroups.com. >>> >>> For more options, visit https://groups.google.com/groups/opt_out. >>> >>> >>> >> >> -- > 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. > For more options, visit https://groups.google.com/groups/opt_out. > -- 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. For more options, visit https://groups.google.com/groups/opt_out.
