I've a BBW (Rev A6) that has been running an IOT application 24/7 for 5 or 6 months now. Its worked great, until now.
I had a weird hard lockup where it stopped with all the LEDs off and didn't respond to the reset button. I immediately suspected failure of the 5V supply as the 12V parts of the system were still alive I unplugged the power supply and it wasn't dead. When I plugged it back in after a quick test of the power supply, one green LED and both Ethernet LEDs lit but it still didn't boot or respond to the reset button (which I left accessible via a pencil point on purpose). I unplugged the power supply again and left it unplugged while I checked a few other things. About 15 minutes later, still scratching my head and fretting about the hassle of swapping in my BBG I have on hand as a spare, I plugged the power supply back in to make a few more measurements (access to the board is difficult, but key interface circuit points are probe-able) and the thing booted right up and is working nominally again. Any ideas what could have caused this need for a long interval without power before it would boot? One of the other devices in the IOT system sent me a "no hearbeat" Email message about it, as designed, but since a simple power cycle didn't initially cure it, this could be a real problem eventually, (I haven't yet implemented the planned power cycling hardware). Needing a 15-20 minute power down to reset could be hard to deal with The BBW is on a UPS, same one as the router which never glitched, so its hard to see it as a AC power issue, although a thunderstorm is moving through the area (small one by our standards and I never noticed the lights dim or flciker). Also the Raspberry Pi2 which sent the "no hearbeat" message never glitched, despite not being on a UPS. I'm mystified by this "long time constant" for the power cycling to have any effect. Nothing on the BBW gets other than barely delectably warm to a finger touch. Any ideas? -- 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]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/7dd6365e-8494-42b9-a178-3f48d375bf50%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
