I recently fell back in love with my Space Invaders pinball after not having it on much for the past few years.
I changed out to LEDs and reflowed the displays and it basically plays better than it has since I have owned it (about 20 years).
I am seeing a slight issue:
When first turning it on, the sound is not quite right:
1. The flippers don't make the blast sound.
2. Other sounds are different (like the spinner target--it makes a much more tame and different sound than usual. The drop target makes almost no game sound).
After a game or two, the sound returns totally to normal.
Anyone have any ideas what this might be?