Do not clean coils. You can replace the coil sleeve if it's binding and the coil resistance is still within spec.

Per your manual (see chart below) the auto-launch and scoop use the same power line connection as the trough up-kicker. Assuming they are working, check transistor Q1 after you verify you have 50v at the coil lugs.

Since none of the pops are working I'd suspect a broken wire. The power line is yellow/violet for all four of the non-working coils and the other two I mentioned above.

Check those things and let us know how it goes.

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It’s just code causing the ball search to happen. A ball search cycles through firing all the solenoids, trying to free a ball that may be stuck.

Try the solenoid test, can you get the cap to pop on a specific one? I’d suspect a short involving that solenoid sending voltage where it shouldn’t go.

See top of page 6 in your manual.