So I may or may not have caused this problem but either way I need advice.
2 coils on my jurassic park lost world stopped working.both stopped at the same time.
The bottom turbo bumper and the auto launch.
I followed the Dr.Pinball and both coils fire when I ground the respective transistors.
ruling out a problem with the coils/wiring to the coils.
so I changed out the transistor for the bumper and no change.

What I find weird is that when this first happened I had a quick poke around and they both started working again.Then today the problem is back.But I cannot get them to fire.

The two coils are in different High current coil groups but do share the same power line .
Any advice welcome.
Thanks