Could be a number of things.
1 - EMI Filter has a short.
2 - A wire (active or neutral) is grounding - this could be within the power box that houses the EMI filter / varistor. If the varistor has blown, then it is possible there is a short and this is a dangerous problem.
3 - Transformer has crapped itself. I have only seen one transformer crap itself in the last 20 years.
I would have this game looked at, as it will keep blowing fuses. I have seen many games "over-fused" recently, which is an alarming problem. I'm glad your safety switch is working !
