24" 2008 iMac with busted video card, advice needed.
I have a 2008 24" iMac in which the video card is busted. The machine will turn on, get to the log in screen with no issues, however there is absolutely no video output to the screen.
I have attempted connecting it to an external monitor using mini DVI to VGA and a VGA cable, but the machine is not set to display to an external monitor.
Having the video card replaced will cost in the region of €300, an amount I'm reluctant to spend on a machine which is seven years old.
I have it backed up, so I'm really looking for advice to to how to wipe it so I can sell it on for parts, or other suggestions...