[Jukebox-list] Seeburg PFEA1 Selection issue

I’m currently troubleshooting an issue on this Seeburg Electra.

The machine has credit on, latch solenoid engaged. Attempt any selection, buttons latch and stay down, carriage scans but the buttons do not release.

Looking in the manual this machine came with an APU3 ( pricing unit) but this one has a UDPU4 installed.

I checked, cleaned all leaf switches on the ES but having trouble determining where the fault lies.

Is it possible that this universal pricing unit is not compatible with this machine? It doesn’t seem that it would be as the plugs match the sockets correctly

Regards Rick