Vertical lines on WG257191

[RyuHayabusa78]

Back again with another issue. Seems in the last few months I've noticed some faint vertical lines on the left side of the screen. It's really only visible when the screen is filled with one color, say dark blue on the SF2 Turbo title screen. Otherwise the monitor looks great, colors are great, etc. If I turn the contrast way up on a black screen you can really see it, as shown in the pics. I've messed with the contrast, brightness, etc. but they don't go away. Any ideas?

[grantspain]

probably cap related