Quoted from Melvyns28:Just picked up two f-14’s one a project and the other a very nice machine. I think the spinner was changed out at some point. All picks I’ve seen are different than mine even my project is the same as all I’ve seen. This is a very early production game so not sure. The spinner doesn’t score at all. Not on regular or lit. Not sure where to go the diode us ok on the switch blade but don’t know where to go from here. Any help here would be great.
Check the contacts with an ohmmeter. Sometimes the switch blades are shorted closed, permanently on....this would prevent the switch from registering. Check the wire colors of the switch and compare them to the switch matrix chart, since this is a game that you are unsure of its present state. Follow the wires back to the other switches in the row and column of the spinner to make sure that the signals daisy chain is being passed (i.e., a broken wire on some other switch can prevent another switch from working)
If you still can't find it, we can refer you back to testing the motherboard to make sure there are no problems there - to confirm this is a playfield problem. Most likely it is. Good luck.