I've been working on a 1960 Williams 21. There are still a few things that need attention but I am finally close enough to play test it. When the ball hits the center pop it triggers the tilt. The other 2 pops seem to work without any trouble. Upon visual inspection coil looks fine. I'm sure I will figure this out but I didn't have time to dig into it this weekend. Now I'm at work thinking about it and was wondering if anyone else had ever encountered a similar issue.

Oh yeah, I did check the tilts switches and I'm sure this isn't a vibration issue.

Any input is appreciated.
Alex

Sorry Dirt, I haven't had a chance to check yet. I was running an errand.

I'm pretty sure it has it's own relay. I'll probably get a chance to poke around at it later this week.
Thanks,
Alex

Yeah, I think you may be right. I think that is where Dirt was going with manually lowering the pop bumper ring too. The coil looks fine but it seems like a likely culprit. I probably won't have a chance to mess with it until Wednesday evening.

Ok, I got a free moment tonight. I manually lowered the pop bumper ring and no tilt. Nice. So I found the pop bumper relays under the playfield. I manually triggered one and the the two outside pops activated. I manually triggered the other and the center pop activated. No tilt. Odd. Lowered the playfield and played a couple balls, no tilt. It seems to have fixed itself?

Thanks to those that commented.
Alex

Don't say gremlin! I hate these mystery fixes. I'd prefer knowing exactly what the problem was. I love my Williams but I swear they have more weird problems than the Gottlieb games I've owned.

And Dirt I assume you wanted to me to lower the pop ring to see if anything was binding, melted coil etc.? Otherwise it's like the Bud Light NFL commercial. "It's only weird if it doesn't work."

It's always nice when it works but there is no satisfaction in not knowing. Not to mention the fear of an issue returning.

Ugh, I better polish my nudging skills. I have only played a few balls so far but I get the impression this one is going to be brutal.