tidbit ... processor state ... you know how cell phone near speakers makes them chatter?

So this T_4.1 sitting here in fail state - my wife and I hear this odd noise through speakers mild cyclic chatter/squeal. Fifth and final thing to resolve was turn off the non-blinking Teensy - though it was running SdInfo in a no run state IIRC.

Not sure if that might indicate anything unusual/specific about processor state.