I got a 2009 A1224 just to take apart and reassemble for educational purposes, and was amazed that there was no video card. I have watched several videos on how to replace them and remove them and I am certain it is not there. This makes no sense. It shouldn't work with out a video card, but there just doesn't seem to be one. I am very familiar with MacBooks, but these desktops are foreign to me. Can someone please help?