[Wlug] failed graphics

Thank god for mutt... My motherboard integrated graphics died this evening. It still works in console mode (have to boot to init 3), but when I try to start graphics, or go to init 5 -- caput. What I see is a most of the firmware boot (e machine logo) with fritzed colors in a band across the top -- about 15% of the screen. I was wondering if I could just add a new card and have that work. To do that, I suppose I'd have to find a way to disable the motherboard graphics card Any ideas? If this seems like a good idea, can you recommend a reasonable graphics card? I'm not a gamer. The most graphics-intensive thing I do is watch a movie. TIA, Bill