SWEP1

[infinite1977]

Not sure replaced receiver side but still does not register. Is it possible to put them on the wrong way??

[infinite1977]

Also everytime I tap the playfield it seems switches go on an off, more importantly ball opto 4 opens and shuts according to switch test.

[DSB]

Not sure replaced receiver side but still does not register. Is it possible to put them on the wrong way??

It is possible to put them the wrong way but if so it will not work at all. Sounds like a bad connection somewhere in the looms. Can you determine which switches are triggering when you tap the field?

[infinite1977]

I will have a close look to see. I still can't understand how this one would go on and off when I tap the playfield.
To be continued

[DSB]

So opto 4 is working intermittently and triggering when the playfield is tapped?

Sounds like a bad join somewhere. Check the header pin solder joints on the trough opto receiver circuit board for any cracks.