I used AD2 with a Digilent Impedance Add-on board, and absent-mindedly pulled it off while it was still on and active!
The result is that, although the impedance measuring process works ok, and I can use the wavegen 1/2 on the scope 1/2 with jumpers externally, it won't trigger internally now.
A curious thing is that in Static DIO, the pins react with a flickering when I run my fingers along the pins.
Looking at the CCT, it seems I could have damaged the internal digital 3.3V supply, IC30 AD2503, which just seems to be for the diode protection ccts of the dio's.
What to do do now?
I Re-installed Waveforms, reset calibration...