Dark black oval on monitor

Joshthewolf

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Had missing red on our Burgertime cabinet, but no black oval. Pulled it for a cap kit and reflow, got the red back and image looks pretty great, but now have a dark oval on the side of the image. It's more noticeable if I crank the screen knob up, and it shows a dim image inside. Never seen this before and most of what I was finding online was either dark discoloration or LCD's with black spots. Any help here would be great!
 

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What monitor is this? Another user posted a similar issue recently where they had a much bigger black spot after they installed a capacitor backwards.
 
Dose the spot gets bigger as you change the image size? Dose it respond to horizontal change or vertical? How about playing with the vsync to see how it rolls?
You also have some retrace lines on top your monitor (top as is horizontal). Low B+?
 
What monitor is this? Another user posted a similar issue recently where they had a much bigger black spot after they installed a capacitor backwards.
Here is the link.

 
Dose the spot gets bigger as you change the image size? Dose it respond to horizontal change or vertical? How about playing with the vsync to see how it rolls?
You also have some retrace lines on top your monitor (top as is horizontal). Low B+?
B+ is actually measuring 154.
Vhold made it go huge, but dialing in vsize I got it to go away entirely.
This is in a commercial arcade, so I'd like to leave it running if I'm not risking damaging it.
 

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