The plug associated with those switches is j206 so you could try and reseat the plug. The wires are violet and green so you could inspect them for any signs. Could you go into switch edge test and post a pic of the switch matrix. Also you could do a jumper test on the switch matrix to see if it is on the board or on the playfield.

Replacing boards is a good start, but connectors usually end up being problems as well, especially at J206 on the MPU if there was Battery Acid Damage.

If you really want to eliminate issues, buy the Pindorabox IR boards, any others are just garbage. Also, if you are rmoving the MPF and tearing it down, I would replace the single optos on that unit as well. Taking that unit out is not easy and it is easy to bend the frame. Just my 2 cents. Good luck with this and keep us posted.

On the coin door there is some buttons to go into credits and diagnostics. So hit begin test and go to main menu scroll over till main menu test. Then enter switch edge test shows up enter again to see switch matrix.

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Throwing parts at it could help but gets costly and always doesn’t fix the problem. This could be as simple as something touching something it’s not suppose to or a bad diode on a switch ,a broken wire. I could go on forever cause there is so much to learn.

your test video shows a bad opto on the left middle mushroom switch.
So, pindorabox.com opto boards.

Order the swinks opto carrier in black.
This is important.

Even with a new carrier from marco the optos will get misaligned and continuously give you errors.

Get a new motor controller board as well as a 10 opto board.

I got the homepin boards and have had good results.

The rest is a matter of connectors and brittle wires that might have to be addressed.

from the video your frame and motor/gearbox seem to working good enough.

I get you want it fixed but you may want to check your boards first before you swap in the new ones. If you fix your old, you resell the old ones as NOS.

IF you have a CPU issue, broken wire, connector issue the problem will follow.

Pull the MPF, get the optos out and plug the connector back in. The view the opto emitters from a camera (iphone works) to see if the emitters are glowing. They are on 100% of the time. If any are out, start there... reflow solder, check continuity to the connector.

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faz

The switch matrix represents columns and rows, that when activated show the closure or opening, in an Optos case. Press a target or other switch and it will provide the corresponding switch number, and wire color.