Controlled lamps stuck on - capcom pinball magic

[David_Vi]

Had some friends over and all the pins behaved until the last hour where I noticed a few lamps stuck on on Pinball Magic (which I'm borrowing from @MajesticPinball ).

Any ideas on what it could be or how I should investigate further?

 

[David_Vi]

Turning it on today, it first appeared fine!

Then a short time later they returned to being stuck on....
I turned it off at the wall and waited... Turned on and its ok.

That should help in diagnosing? Maybe something is holding onto the power?

I'm a total electronic newbie except for knowing what a fuse and diode does.

 

[MajesticPinball]

I wish I could offer more help but I'm not really very informed when it comes to Capcoms check all the sockets/wiring in the columns that have issues and go from there. You know how easily the wiring popps out of place on this machine