We're having the same week! See my post here: https://pinside.com/pinball/forum/topic/what-machine-did-you-bring-home-today-post-your-pictures/page/415#post-6346138
One of the centrifuge optos was stuck on, so it kept thinking a ball was in there and spinning all the time. There's two optos. They're real easy to find, just pull the plastic off the top. Go into switch test and they should be off. Put your finger in between the optos and if they activate they're ok. If either is stuck on, you have my same problem. Start by checking the connection and ensuring that it is wired correctly. This was my problem, someone wired one of the receiver LEDs in reverse.
