Getting back to RIO AHRS install after a loooong time

Yes, you could be right, though I'd have thought that a logical reset of all chips and c_startup() would zero/reload memory etc. I'm not sure there's an actual need to electrically shut the system down. but maybe there's a hole in the initialisation procedure somewhere which means it doesn't really reset unless the power goes away.

Anyway, worth knowing and power off is a sufficient workaround I'd say.