Starting over, I was finally able to dig into this myself. I picked up an SST and have been having some switch issues. Some switches are working, some are working intermittently, some are not working at all.
Mini flipper: works intermittently. I installed a new cabinet switch, and reflowed all of the connections up top on the flipper mech and fuse holder and still no luck.
Pops: For the most part not working. The left will intermittently fire when activated. These are all on same column (7). I had bad diode on the center pop which I replaced.
Left Top Lane: This had been working intermittently, but since fixing the diode on the pop it seems to be consistent now. (column 6 and row one same row as left pop).
I replaced all of the diodes on the pops, and lane guides. I have continuity on the pops through the rest f the column to the right ramp enter and exit (latter are working 100% and diodes are A-OK).
When running the switch test the three pops and the left lane are showing closed. Any suggestions on where to look next? I watched Terry B's video and have been reading his writeup on switch matrix issues, but this has me stumped. The pops and left lane are presenting like a diode/downed wire and I have no idea what would be causing the mini flipper to malfunction like that.