Alienware m7700 (clevo D900) help

I have a alienware m7700 (clevo d900) type laptop. It has a amd x2 4400 cpu, 2gigs ram, 120gig HD, 7900 gtx nvidia Geforce Go video card. However recently my machine has died and i'm not sure if it is the video card that has died or the motherboard has fried. At first i would get artifacting in video games. So i bought a laptop cooler (which was essentially fans in case to blow air into your laptop) to try and keep my video card cool. That worked for a while then i started getting stuck pixels. Now i say stuck because i could solve this issue by opening up WoW (world of warcraft) and leaving it running in the background. Which was fine but i couldn't use windows media player or any other video player to watch videos with WoW running in the background. The area where the video should be playing would show what essentially looked to be a cut out of whatever was showing in your background before opening the video player. By leaving WoW minimized i had no stuck pixels and everything responded fine. However not much later I had to constantly leave WoW running in the background because if i did not everytime i had a dialog box or window open my computer it would lock up and go to a complete black screen. After a couple of seconds it would stop and everything would be fine. Until another dialog box opened and the same blackout would happen again and again until the box loaded completely. If i had images loading on my screen from my internet browser (firefox if that helps) my screen would go through these blackouts over and over until i either shut my computer off or waited for all the images to load. Even with these blackouts with WoW running in the background i still wouldn't have any stuck pixels however. I know these notebooks had really bad motherboard overheating problems but i also know that the 7*** nvidia series video cards (both notebook and desktop) had terrible overheating problems. I can still turn my computer on and it still has all the stuck pixels (because everytime i try to turn on WoW my comp locks up and i have to shut it down). But it responds slowly. Takes forever for window boxes and programs to open and even if they did my screen would just blackout and i would eventually have to turn off my laptop or the blackout screens would just loop forever. Due to the artifacting on games with my video card i think my video card is shot. However it may be my motherboard that is shot or both. Windows loads just as quick as always and everything responds fine. It just seems that everytime my video card has to work, even just a little, it just dies. I would appreciate any help i can get in determining the problem so i can order the parts from Rjtech.com asap.