Hantarex Polo 25: Green Screen!

[Arcade-Projects]

Hey guys, I'm a bit of a noob. Long story short my arcade machine was out of commission for an unrelated issue for the past 4 years. Just got it running again. When I powered on for the first time the screen was kind of dark and a little red. Adjusted the settings and thought I was in business. Well today is day 3 of being back online and I noticed a shadow on the left side of the screen this morning and about 15 minutes later everything black is bright green. Is this thing dying? What could be the issue? The monitor was replaced in 2007 per the service records.

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