K4900 screen warp problem over time

Raikus

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I have a WG K4900 monitor that begins to horizontal warp on the bottom third of the screen. It's a bit hard to describe so I drew a picture of the problem. When you turn it on everything is fine. After about 10 minutes it has a noticeable warp and it keep growing over time. What could be causing this?

7216012356_262ac2f71b.jpg
 
If you haven't capped it in a while, that could do it.

Otherwise, tweak your horizontal hold a bit...
 
Thanks, I'll test that Saturday. It was capped about 2 years ago. Just never seen one do that in one spot of the screen over time. Thought it might be a sign of a failing flyback.
 
No luck with any pots adjustment. Also changed PCBs and some problem started after warming up. It seems to get worse the longer it goes. Here's what it looks like after about 30 minutes.

7246173216_abb9d07de4_c.jpg
 
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