Hi Everyone. Gottlieb King Rock is the game. It's a 230V export version. Owner moved it from Lebanon to the UAE (same voltage between both countries) and now the machine blows the main line fuse on power up. History of the machine is unknown but I know the following:

Main line fuse was over-fused at 25A (!!!!) Replaced with 5A slow blow.
Other fuses also the incorrect ratings.
Line cord was old and only the original 2-pin type. Replaced with 3 core and added ground connection to transformer. Ground braid to be added later.

Main line fuse still blows on power up and it also trips the circuit breaker at the house.

Since transformers rarely seem to fail I'm wondering if the wiring to it is suspect. That said this transformer looks toasty. Photos attached. Perhaps the transformer has failed? How would I go about properly testing it?

I'm generally competent with pinball repairs but less so with EM's. Thanks all.

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Thanks for the advice I will try that. It does indeed look toasted - never seen one that looks this crispy!