I'm trying to sort out a Tilt lamp issue I'm having on a Stars that I'm babysitting for a buddy of mine. The tilt switch works (kills the coils on the current ball until it drains;no bonus). I've replaced the SCR, reflowed the solder to the pins on the board, checked to make sure the wire is in the right spot on the plug (position 10), changed the crimp contact on the wire, checked continuity from the lamp to the board (to the pin on the back of the board) and it's all good. There are no burnt traces or lifted pads on the board (it's in good shape). The lamp doesn't work in test mode, but when grounding the SCR to a TP1, it will light (as verified by my wife, I haven't seen it myself, she said it was dim). The lamp doesn't flick when the game is initially turned on.

Any thoughts?

I checked the resistor and it sees an ohm value of 2.5 IIRC; it's in line with whatever the others are, so the resistor is good. I don't have a great way to check the chip. I was asked to connect a logic probe to it, but don't have one (I should get one). Instead, I was asked to see what voltage it pulled in test mode and the DMM jumped from 0-20-0 etc. If a logic probe will give me better information, I'll get one.

Hmm..I'm going to wait before I try anything that might do further damage