Recently my 5971/5890 (series II) showed 'no flow controller' installed. I was able to transfer the flow controller and the flow controller card from my other 5890 Series II. I was not able to test whether the actual flow control valves or the controller card failed because... The dead system had the dual 7-pin control cables and the one I transferred in had six 10-pin control cables. Any idea how to tell what failed; the card or the solenoids?

I'm hoping someone remembers if that error text is generated by (1) the system not seeing the controller card or (2) by the mass flow controller not responding.