CRT TV Vertical Deflection Problem: Top of image not starting at the top of the TV

MrMDAN47

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Oct 14, 2014
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I Have a CRT that was given to me and I thought it would be cool for older games.

It is a Toshiba Model: MW20F51

The picture was fine when I saw it first, but when I got home the picture near the top looks like its folded down (upside down text in pictures).




it looks like it doesn't go all the way to the top before it starts drawing lines and then draws lines upside down until it gets to a certain point, then draws all the remaining lines fine.

So it looks like a vertical deflection problem. I have already tried unplugging everything and plugging it back in, trying different video sources, inputs on the TV, and the TV tuner, and the problem persists throughout all of the different video sources.

I've never seen this problem before and I have tried googling it but I have found no one with a similar problem. Dose anyone know what this is or at least where I should start to try troubleshooting?
 

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