Quoted from slochar:
Do you have regular bulbs or LED's installed? Anything change recently? i.e. did you JUST install bulbs or something else?
The lamp matrix in that machine isn't designed for LEDs and you may get some ghosting.
I just finished a complete restoration. So it has been taken completely apart 5 years ago!
Everything is cleaned etc. but before I did that the same LED's where installed and it worked just fine.
When I fired it up for the first time a couple of days ago there where only two problems. This is the last one I need to solve
I really_ appreciate all the people trying to help me with suggestions/debugging.
Here is a video of the second target light that is part of the row "acting up". As you can see its not on all the time or brighter than the others. It just behaves wrong. The other light in the row is also acting "strange". Not on all the time but strange behavior.