An unknown fix

[philtech]

Hi everyone...
I had the strangest thing happen with my firepower 2, where suddenly the displays shut down and the game being played stopped.
I checked everything over and could not see an obvious problem, so began a test by unplugging each plug one at a time until I could see something obvious.
I found that unplugging the connector wiring to the (bell, tilt switches and door) that the displays stayed on and all seemed normal except for no play.

Hmmm, well checking the bell (that shakes the house down) with a multimeter, the switch contacts (normally closed) gave a reading of being open.
After a clean and adjustment I booted up the machine again and all is running perfect now.

 "So if anyone has an idea I would like to know with the bell switch contacts being open,, can this prevent the machine from working? Or could I have disturbed a bad connector?"

I am new to owning a pin machine though experienced with electronics, so please forgive me for any stupid questions as I get my head around how they work.

Thanks, Phil...

[ajlaird]

A lot of problems arise from bad connectors (intermittently bad) so I know a lot of the guys on here will replace connectors as a matter of course.

We will wait and see what they say.

[Strangeways]

That's an interesting problem and solution. anyone with a similar problem can do a search and find your solution. So by fixing the issue yourself, you have learnt something and importantly, shared it with everyone else 

[goodolddays]

Well done for finding and fixing it yourself  and taking the time to post the answer here