Monako Merry go round/Weather caster alarm

[JohnS]

Newb here, so please excuse my ignorance of Pachinko terminology.

I bought Drunkenclam's Merry-go-round/Weather caster a while ago.

When I get a "jackpot" where a ball goes into the middle bit and the machine starts playing more tunes and making wins easier, between 1 and 60 seconds later the machine goes into some sort of fault mode where it beeps like crazy and doesn't work any more. It does not fix itself, I have to power cycle.

Any ideas? As it does it with both the merry-go-round game and weather caster game I assume it is not a CPU problem and it is some switch or power problem. Though why a switch would only trigger an alarm during a win I don't know.

I have no manual or circuit diagram...