I have a NOS AFS4500 that I purchased and am having problems with getting certain engine instruments to function.
I had a Dynon FD180 and D10A in my aircraft so the pinouts were very similar on the exchange. All engine instruments were functioning normal.
My issues are the following:

The gages are displayed and configured just not getting any info.
I get No F/F reading using my original Flowscan or a new FT60 Red Cube.
No RPM reading off Pmags using either R or L input with or without 5v zener diode. A T30 tach works fine so it's not my Pmag signal
No CHT/EGT which was a direct cable swap with Dynon

The other engine instruments are working.

I'm currently swapping back to my Dynon FD180 in the interim.

Is there something I'm missing or does my 4500 need servicing

Thanks
Rocky