On my recently completed Strikes and Spares I've had something strange happen a couple of times.

First, it's got the complete new board sets from Alltek, and a newly rebuilt power supply (rectifier board).

It was working fine for many games, then it suddenly started doing the following-
Ball goes in top-right saucer
Chimes AND top left pop bumper fire three times.
Game resets.

Upon inspection I noticed that the small clear protector on one of the switch lugs for the saucer was pulled back, but didn't notice any obvious shorts. I pulled the switch and re-seated the protector.
I also noticed that the wires for that switch were NEAR the pop bumper- but once again, no obvious shorts or cross-talk points. Just to be safe a adjusted a few wires for a little more clearance.

It hasn't reset since I went in and made those changes, but I'm still suspect that it might not have anything to do with the switches or wires in that area and wanted to put it forth to experts for other areas to check should it happen again.

Thanks.