You've got good advice going on here from the folks above. I would second newmanfamilyvlogs that you should highly consider reading up on GroovyMame. CRT Emudriver modifies the drivers of your ATI/AMD graphics card to allow it send signals below 480p (31khz). As lilshawn said the graphics cards don't really want to go below 480p as that was the standard for computers.
You can get a good signal to the TV, you will have a couple of hurdles though.
1.) With Component input (PyPbPr) you can't simply connect the VGA to Component cable. You will have to do a conversion via a Transcoder.
2.) You can as lilshawn suggested RGB modify the TV to accept a direct RGB signal (one that comes from your computer).
Problems with 1.) is that Transcoders that
don't scale or convert the signal aren't that easy to come by (expensive too).
Problems with 2.) is that RGB modifying a TV requires a decent amount of knowledge of CRT's and comfort with soldering and potentially looking up schematics.
I bought my transcoder off of a guy that was putting them together on e-bay, but he appears to not be selling them
anymore.
Here is one I found that may
work, although you would definitely want to confirm with them that it doesn't do any scaling, just transcoding.
As for RGB modifying the TV, there is a great resource for doing so on the Schumps Forum
here . I would also suggest doing a YouTube search for RGB modifying a TV into YouTube to get a sense of what it entails.
Lastly, as that appears to be a Sony Trinitron clone (use of aperture grille), there may be challenges in getting signals below 59Hz. At least that was the experience of myself and a number of others in using Sony's flat panel CRT's. A number of original arcade titles used refresh rates below 59hz, and you have to accept some compromises. Sylvania could be using a different chassis on the TV making this a none issue.