Well it doesn't seem to be the key switch or the control panel. I swapped the key switches and then the two complete panels from the Hyster to the Yale. Yale panel works just fine in the Hyster and the Hyster panel shows the same faults in the Yale. It's good the panels okay, but I'm back to square one. Any more ideas? Found out the software is version 3.31 when panel was in the Hyster. Couldn't read it in the Yale.