Wow, you guys are fast. Thanks, Thunderbird for the informative reply.
I have tried out several configurations as recommended by the RH7.3 install, those being "Generic Laptop Monitor" at various resolutions. Each "Generic Laptop Monitor" resolution has different recommended VSYNC settings, and I went ahead and used those. In some cases, it was 60hz, in others it was 50-70hz, and in yet others it was 25-40hz. All of the base settings failed when testing. Either I would get a shaking screen, or nothing at all.
I guess the best thing to do would be to see if I can find the settings for the particular laptop screen I'm using as it's not listed under the manufacturer name during install. I've checked Toshiba's site and there isn't any information there I could find. If anyone here has a good source of that type of information I'd love a pointer.