ive read a few posts on this issue but still having trouble identifying my problem. Once i lock all three balls for two towers multi ball the coil wont release and i get an operator notification lock 21 malfunction. Ive checked all three roll over switches and all are fully functional. Ive also check the coil in test and it is functional and does release single balls without a problem when not locking. I was getting low reading on the coil diode so i changed it out but that still has not fixed the issue. It doesnt appear to be a coil issue but just in case I ordered a back up coil. What else could the issue be? Any thoughts or experience with this problem much appreciated!!

Ive just replaced all three roll over switches to be sure and the problem persists. Any other ideas?

i suspect its a coil issue after playing with it for a little but it looks like when the weight of 3 balls is pushing again the pin the pin is stuck and wont go down if i help it a little it works ill try changing the coil when it arrives and see if that solves will update thanks in advance

changing the sleeve did the trick for now. still seems a little weak so ill change out the coil when it gets here thanks for the input all!