Rear Projection TV horizontal lines issue

gleegum

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I'm not sure if this is the correct forum to post this, but there's very little info out there about RPTVs.

I have a 46" Hitachi RPTV with horizontal lines all over the screen. Additionally, the picture "wobbles," and while the image improves slightly over time, it never fully clears up.
With my limited knowledge of CRT monitors, I suspect this might be caused by a failing capacitor in the power section of the board.
Upon visual inspection, there are no bulging capacitors or burnt components. Any ideas on what I should look for?
I've connected several devices using different cables to various TV inputs, but the problem persists.

Here's a video showing the issue:
 
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