Did you try putting back in the regular bulbs? I assume the lights were working before you put in the leds. If the socket works, then try adjusting the metal contacts on the bulbs and on the twist socket. I had to fiddle with some of my bulbs when I did my Getaway.

Do any bulbs work - led or incandescent? Try ones that you verify work in another location. Try swapping twist sockets with ones that work to make sure it's not that either. If you know the bulb and twist socket are not at fault, then you work your way back. If you are doing that, I would start by making sure you are getting the right voltages to that board.

I had my sc ramp opto go bad. It still played okay but balls were never diverted into sc. They would go up the ramp, loop around, and back down the left while giving out the right points. The game would throw different errors relating to the sc, diverter, and switches but it was only one bad opto.

There are 4 optos in the sc. In the switch test menu, you can test each one by breaking the beam of light with a ball or hand. You can test the diverter and sc magnets as well. I am not sure what is going on with your machine but try to pinpoint exact switches or parts are not working.

I also had some troubled with led strips and ended up frying a gi connector. I would leave those disconnected until you work out the other issues. The main thing is to turn off the machine when working under the play field.