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So I am working on a NBA JAM that was dead when picked up.

The PS was toast so I dropped a new one in and the game fired right up.

The voltages are good.

Everything works great except for roughly 20% of the image on the left side of the screen is noticeably and significantly darker. It's tough to tell in the photo I provided but when the game is running the area is not 'blacked out', the game is still visible.

I was unable to adjust it out using the pots.

My first thought is that this is a cap issue so I pulled the chassis for rebuild. Hoping this is not a tube issue. Is this a common failing due to cap or flyback issues? Looking at the chassis there is nothing that jumps out at me.
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