Try connecting just 1 of the monitor inputs to the card, either digital or analog. If the monitor works fine on another computer then the only basis for your problem will most likely be a bad videocard slot, the actual slots themselves have been known to be faulty and not supplying the required voltage. I do believe the reason nothing else is powering on your system is by default Windows has a "Stop" on boot errors preventing anything from powering up during the POST once it encounters a problem. If you have a Multi-Meter handy, check the videocard slot for voltage, should be about 3.3 volts for 8x-16x AGP slots, though it steps down if you stick an older 4x card in there as well. Hope you work it out. Cheers!