Rod Whitby wrote: > but never as a result of the normal NOR boot sequence.
Has it ever booted from NOR (before it started to act strangely) ? > *Never* have I been able to get it to boot twice in a row. That sounds bad :-( I've seen systems behaves like yours, but they were usually afflicted with some hardware problem. Normally, it's the VB_SYS cap Andy mentioned. Just to check: is this GTA02 a mass-production device or a preview model ? Could you please mail the serial number ? > I'm monitoring the nRESET line at various points in the sequence above, > and I've never seen it go above 0V. That would be consistent with the capacitor problem. (But could be a number of other things as well.) I guess you don't have an oscilloscope you could attach to watch it continuously for you ? > Knowing that the batteries and usb charger are fine, and that nRESET is > still low, what's the next level of debugging I can try - how do I work > back from the nRESET test point to the PMU pins to find out what's going > wrong? Hmm, that's the point where I'd start watching voltage levels with a scope, and maybe have look the the capacitors under the shield ... - Werner
