My first post!
We recently took our pin out of storage, and there were some display problems. Ribbons all seemed fine, and 3 of the displays worked fine, but one display was dead, and P1+P3 were missing the ones digit (7 digit display).

I thought (hoped) that the main problem was in the display control board, and with the busted display, I jumped for a Pinside replacement...

NOOO! All displays work, but same problem with P1+3. I tried switching up the ribbons (still originals), and the problem does not change.

Any thoughts, oh pinball gods?

IMG_20200110_203907596 (resized).jpg

Looking in my manual, it seems to have to do with strobe 8. Help!

Oh boy. I figured I out. My battery pack corroded while we had the machine in storage (expired 2002, I blame my naive youth for everything). Replaced the battery pack and thought the corrosion was pretty contained, but yep, I found the strobe 8 trace on the board, and corrosion damage... I did my brst to clean it up a bit, and it did make a difference (ones digit lights up, but over bright). Should I use a soldered wire to bypass the trace, amd cut through it? Is that a less risky first step than asking one of my engineer friends if they're willing to retrace it for me?

IMG_20200111_002229067 (resized).jpg

IMG_20200111_004417483 (resized).jpg

IMG_20200111_004434336 (resized).jpg

Thank you all! Yes, I guess I will get to cleaning all of those traces.

For an immediate fix, I bypasses the trace on the back of the board...

IMG_20200111_220703546 (resized).jpg