> Has anyone an plausible explanation for this kind of behaviour ?
> Or has anyone seen such behaviour before ?
i've had something similar with my picsquirt programmer, if unplugged and plugged in again rapidly it often fails to come up properly, if left for a couple of hours after this it starts working fine.

i guessed it wasn't resetting properly or something and stuck a 1K bleed resistor on the power rails, since then i have had no issues with the one that has the bleed resistor fitted. 



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