i agree w/ venjhammet
sounds like your card is dying. This will happen. Especially since your card is kinda old (model came out in Feb. of 06).
p.s. is there any disadvantage to just sticking with the VGA? I have a desktop computer now w/ more than enough gpu for all my needs, so my laptop is really just for surfing/videos.
I'm assuming by VGA, you mean IGP (integrated graphics) that use the VGA port. If your just browsing online, checking email, ect. that should be fine. I doubt you could play HD videos or anything but everything else should be fine.