Taking a look at a friend's broke iMac - White 24" - can't place the model. EMC 2111 is the best I can pull off the case. Entering the serial at Apple just says 24" iMac, no year, nothing. After tons of testing I've figured out the following... 1. Screen boots from grey, to apple logo with spinning loading circle, then to light blue. The cursor is stuck in the upper right hand corner. The screen stays blue. There's visual artifacts all over the screen - almost like stuck pixels. 2. Finally got the bright idea to plug in an external monitor. Once fully booted I see lit black screen with pixels artifacted, like they're stuck - not 1 or 20 or 50, like 100s, maybe 1,000. Now I can move the mouse cursor from screen to screen. The cursor that was previously stuck in the upper left hand corner of the iMac built in screen is still stuck there. 3. With the external monitor plugged in I can make OS X make error *dong* sounds. I'm assuming I'm booted into OS X and looking at the desktop but the video card is refusing the refresh/display any graphics. Is the video card dead / dying? Any suggestions? I don't have any installation media to boot to and attempt a hardware test - typing from a refurb Lion that came with zero media. Attached photos: The blue monitor is the iMac, black = external.