Hi guys, thanks for allowing me to ask here.
I had to replace the pop bumper ring and rod (shown here, I hope) as one of the arms had broken off and made the pop bumper non-operational. I must have hit or nicked something I suspect.
In the upper playfield, the targets drop, don't count, nor does the pop bumper score. Dropped targets get reset when the ball play is over. I've traced the column 5 wiring and tested all connections from the drop targets / pop bumper back to the main board, and all seem to check out (black / green wires).
In the switch test, with all targets up, they don't register as stuck switches, even if I manually drop the targets (I tested 29, lower right, right target) and that registers as stuck once I drop it during the switch test (which I believe is correct).
I read somewhere that changing the pop bumper may short out the main board? Is that true, or can I confirm that somehow? I've since ordered a new pop bumper assembly and hope to swap that out with the (faint) hope that this may remedy my problem, but I suspect it may be the board itself?
As per checking diodes, would one of them cause all 7 issues (6 drop targets + pop bumper)? I'm going to check that next.