Use this guide to replace the video card in your computer.
Locate the case cover latch on the back of the computer.
Using your index finger, slide and hold the cover latch down.
While holding the latch down, place your other hand flat on the side of the case and firmly shift the side panel to the left until it disengages.
Grab the edge of the panel and slide it away from the case until it is removed.
Locate the Video Card and the screw attached to the Video Card as shown in the picture.
Remove the 8.9 mm screw by using a Phillips #2 screw-driver.
Push down on the green clip located by the bottom right corner of the video card while simultaneously pulling the card up with your other hand.
Pull the remainder of the card up and out of it's slot.