If you can not replace the video/graphics cards in laptops than why can you buy them?

I purchased 3 Toshiba Qosmio (2 G15's & 1 G35AV600) that all have bad video cards-I decided to try this after reading a forum where someone had a different upgraded video card installed and it never gave any trouble since (I wish I could find it again!). So anyone with advice on switching these cards I'd appreciate it very much.|||You can try to find an external video card using the express card slot.|||You have to find the exact socket, size, power consumption, and specs of a video card. Its almost impossible because they order the cards special from Ati or Nvidia.If you can find them, and everything is the same as the original (almost impossible to find especially if the computer is over a year old), then you can switch them....assuming they were not integrated. If they were integrated then they were built in and sodored to the Motherboard. You could not possibly take it off and put another on without damaging the motherboard and rendering it unusable. If it was a dedicated graphics card then you should be able to just unplug it from the socket, and plug in a new one. Again if its not exactly the same it could short the whole laptop. All you would have to do is unscrew the bottom, pop open the protective locks/casing under the screen, and carefully (and unstaticly) remove the MB. Good luck. There should be guides to opening the laptops online.|||STEP BY STEP GUIDE TO REPLACE VIDEO CARS IN LAPTOPS http://laptoprepairplaza.blogspot.com/20…