Thanks guys. This is a duplex so I could swap main boards on a Saturday Pieman. Never cared about swapping stuff on relay logic or early solid state jobs but i get a bit anxious with the newer stuff!

I am plugged in the right port. Wasn't the first go round though. And as for a grounded wire, checked thoroughly for that and even used a different wiring harness with the same results. Plug P2 (1st floor car button) from the KEB board is the only one staying lite and I did replace the board with a new one right from UNITEC. Again, thanks for all the suggestions.