The USB is handled by the processor itself. Ethernet under USB power is always an iffy situation as the power derived form a USB host port on the PC is marginally enough for Ethernet.
Not sure what the issue here is. he short flash means the PMIC is shutting down due to an excess current detected on one of the power rails, including the USB input rail, If it exceeds 500mA the PMIC will shut off. Not sure about your override of the 500mA setting. That won't make the PC generate more power. Best bet based on what you have described would be an RMA and get it looked at. Gerald On Sat, Dec 14, 2013 at 9:19 PM, Jordi Guillaumes Pons < [email protected]> wrote: > Hello, > > After a pair of weeks of keeping the BBB off, I wanted to connect it again > and I found it seems not to work anymore. Well, it does not work partially: > > - It does not boot if I power it up using the miniUSB (I have debian > installed, with the uBoot loader corrected to allow 1 amp). The power led > just flash for a moment and then it goes off. If I press the power button > it is just the same: a short flash of the LED, then silence. > > - It _does_ boot using the barrel connector, but in that case I can't make > the ethernet connection work. > > From these symptoms I guess something have gone wrong with the USB host > chip: It does not power the board, nor control the ethernet interface (it > goes up in linux, but it just does not work; the lights in the RJ socket > blink as expected though). > > Is there anything to do before calling the board dead? It worked perfectly > when I powered it down, so this (apparent) malfunction has been a nasty > surprise... > > J. > > PS: I have flashed the NAND and the "native" Angstrom linux behaves just > the same: it boots if I power the BBB using the barrel, but the network > interface is completely deaf. > > -- > 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/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 [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
