I work on games that are located in a barcade that is only closed on Mondays. Anyways they have a Monopoly that has been fine ever since it was put there about 6 months ago. About two weeks ago it started acting up and would not recognize when a ball drained unless you shook the machine a bit. I went last Monday and noticed in switch edge test that the connector for the opto board in the trough was cracked. Reflowed the solder and it worked fine.
Then last weekend get a call that it's not working again; so I figure it's going to be something in the trough. So turn the game on and it says "4-balls missing...searching for balls" when there are all 4 balls in the trough. The game continually fires the lock kicker about 10 times then shows a coil error message and just sits there.
So I go into Portals then select diagnostics but then the coin door switch wont let me go any farther. I can't select the switch test with the buttons as it wont let me advance anymore. I checked all the fuses (I didn't think that was the issue, but tried anyways, and they were fine) and I reseated all the connectors in the backbox.
I head back Wednesday, but the bar will be open and it will be tough to do anything then, other than simple things, until next Monday.
Any ideas what it could be or anything that I'm overlooking?
If I could get into switch edge test it would be easy. If I can't get into switch edge test how can I use a diode test rig to test rows/columns?