On October 16th 2014 21.26.23 UTC+2 Gerald wrote: > > Is the power LED shutoff too? > Gerald >
Hi Gerald. I'm also affected by the OP's issue of periodic failing boots on BBB (I got all REV Bs). My experience has always been with the power led lighting up and the system stuck without booting. Pressing the reset switch takes the system out of this locked up state, but neither boot switch or power switch has any effect. I am very interested in your input on the successful experiences put forward by Andrew and Marcus in May, about modifying uboot to remedy noise input on UART0_RXD (pin E15 of AM3358). I have done some tests today documenting the basic issue and some followup experiments investigating this specific cause, and I would appreciate if you could take a look and comment on the resulting speculations. You can find the details here; http://www.mikini.dk/index.php/2014/10/beaglebone-black-periodic-boot-failure-establishing-failure-rate-and-possible-cause. Executive summary; removing U15 (SN74LVC2G241: UART0 powerdown isolation) seems to remedy the boot issue on a CircuitCo-produced BBB in my possession. Although my result is inconclusive, as I was careless enough to rush myself into omitting a pre-modification test, verifying the failure rate of the unmodified BBB. Thanks in advance for your help, and for my Beagle puppies ;). Mikkel -- 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.
