This is technically under warranty (made in June 2005), but wondering if it's something I can do, without the hassle of shipping, filling out forms and waiting. Color seems OK, just some shaking horizontal lines.
Why did you degauss it? That only cures a very specific fault, namely colour patches on the screen caused by a magnetised shadow mask or aperture grille.
I'm not quite sure what you mean by shaking horizontal lines. Have you tried moving the monitor to a different location? External magnetic influences such as TVs or power cables can cause the picture to 'wobble' if they're close enough.
Failing that, you need to return it for repair- there's no easy answers or magic spells.
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