Bride of pinbot head problems

[markfisher50]

 $.$Hi My Bride of Pinbot turns her head when shes not supposed too. She sometimes very slowly turns during play and loses her calibration?? Any ideas, have checked head switch seems ok. I was told may be getting some pulse from flipper coils and to check resisters?not sure how

[beaky]

try this go into the Diagnostics and run a coil test, let each coil activate 4 or 5 times then move on to the next one, check if it starts turning as you go through all the other coils if it does write down what coil or coils are on when it starts turning. also try pressing the flippers after going through all the coils.
let me know the outcome and we will go from there.