Just bought a 1981 EBD and it has a weird issue with the playfield lamps/1-7 and 8-15 ball (horseshoe) drop targets:
First of all, while all the targets are all standing, the 2, 5 and 6 ball lights next to the targets are out, and down at the bottom above the flippers, it shows the 2, 6 and 13 balls lit. For the second player (shooting stripes), it shows the 9, 10, 13 and 15 balls out and down below, the 13 ball is lit.
When the horseshoe drop targets are hit, it does the following:
Target Top, Bottom
------- ---- --------
1 Stays lit, 9 lights up
2 Out already, 2 goes out (instead of lighting up)
3 Properly goes out, 3 properly lights up
4 Properly goes out, 4 properly lights up
5 Stays lit, 1 lights up
6 Stays out, 10 lights up, 6 goes out
7 Properly goes out, 3 properly lights up
The striped balls have similar issues.
Any ideas of what may be causing this? Any help would be greatly appreciated as I'd prefer not to spend too much (if any) on a pinball repair specialist coming to the house.
Best to all, and start chalking!