Monitor or isolation transformer problem

[Cisek]

Hi
I've got fully working Wells Gardner K7000 in Mortal Kombat II cabinet. Everything was fine, until yesterday. When I turn the machine on, there is sound like a high voltage connected with monitor interferences and marque light blinking. It last for a second or two. I don't know if it is monitor fault, or maybe I've got problem with isolation transformer (if so, than what part should I replace?)

EDIT:
Now the whole machine doesn't even turn on. What could go wrong with isolation transformer?

[Ken Layton]

Isolation transformer powers only the monitor. If other things are not coming on then the monitor and isolation transformer are ok and to look elsewhere.

[lilshawn]

often in the power supply it has a connector that powers the marquee and other whatnots (it's a green/black/white connector) it just passes the power on through when the power is applied.

chances are the power supply has cooked, test it with a voltmeter just to be sure.

[Cisek]

It turned out that power supply is fine, but the powerstrip got cooked, thanks for advices