|Just saying Intel & ATI doesn't mean jack-sh!t. They make 100's of board & cards! We need to know the exact model of motherboard & exact model of video card. We also need the make/model, wattage & amperage specs of your power supply. Drivers have nothing to do with your problem. The error message is, You have not Connected the power cable to your video card. That's pretty self explanitory.|
It could be that your power supply partially fried & it can't supply enough juice to the card. If your board has an onboard video port, temporarily remove the card & connect the monitor to the onboard port. See if the system will boot after doing that.
Which one of these plugs does your card use: