I've got an nVidia GeForce 8800 GT card in the tower; this is the first replacement card when the original died 2 years ago. I'm been running a pair of NEC MultiSyncP241W screens since before the card was replaced. Just yesterday, one monitor has been intermittently turning off and the status light going to a blinking orange. If I fiddle with the DVI cable or the power cable, I can get it working again for a while. Then it goes off again. I've tried switching cables and power cords to no avail. My troubleshooting would seem to indicate the video card and not the monitor. I'd think if the monitor was going bad, it would either work or not work. When it does work it looks perfect. But then again it's just one monitor this is happening to. The video card was replaced by Apple. I was told the card was new. So I'm wondering why it would only last 2 years when the original lasted many years longer, if it indeed the card is at fault. Any advice, troubleshooting tips or experiences would be welcomed. Thank you.