at least two issues here - let’s start with blowing the fuse when hitting the right flipper. Look at the coil for that flipper- is it burned? Does the flipper bat move freely when the machine is off? The only reason the fuse would blow is because there’s a short in the wiring or the coil is shorted.

When you hit the start button, does the motor continually run? If so, then your issue is in the startup sequence. I forget which thread it is, but there is a great write up on troubleshooting EM start sequence issues.

If the motor is not running, but some things are working, then there’s likely an issue with steppers.

Let us know what you find.

Work on one problem at a time,