I have started having issues with my machine. The changup pitch doesn’t come out. All the other pitches come out fine. When I push the pitch button i used to have to hold it for the pitch to come out instead of just press it like the others. I removed the switch from the button thinking it was the same issue but it still doesn’t work now when it is even held down. Any idea where to check?

Please help!!!!
Everything works but the change up pitch. The machine makes a noise but no ball comes out.