So... and odd thing happened last night.

I was replacing bulbs for leds on the playfield for my (Williams) Blackout and on one particular socket I noticed that it will short out the GI (GI lighting will go off) removed the bulb immediately but now my GI doesn't lit. The fuse below the power supply seems fine. The backbox and the lights (controlled lights) under the playfield will lit fine.

One thing though... I put the machine on service mode to check all the lights and while on that mode, the wire that connects to the tilt leaf switch, the one that is at the end of the ball-tilt it started smoking.

Any ideas?

Many thanks!

~jac

So my short is definitely on a bulb socket, correct? my board is a rottendog mpu, forgot to mention it. Ugh!