I ve had in the past a quite similar issue with a BOP and one of data pin from cpu to driver board was poor contact as trace was bad on cpu pcb if you have another cpu pcb try to swap it !

I have had very similar issues happen to me before and have fixed it several times by running the head cycle 2-3 times as well as a full solenoid test once or twice and usually it fixes the problem. I would recommend trying the in game diagnostics out such as the solenoid test, head mtr/sw, head coil, and head manual a few more times before replacing any parts.

Also, I have been wondering if this is caused by a switch/solenoid not being activated for a few games and that this is the games way of saying it thinks there is an error. Is there any parts on your machine that haven't been triggered recently? I think on my machine if the small wheel lane has not been hit in a few games this happens to me.

Let me know what you think and if any of this fixes the problem. I would like to know what causes these problems as well.

A bride behaving badly with the odd head ...... shocking!!