Network Cable unplugged ??

For some reason my pc will keep saying Network cable unplugged every so many seconds. And i tried using three different PCI network cards in both pci slots and they all are doing the samething. Got any Ideas?Network Cable unplugged ??
Three different? Doesn't the motherboard have ethernet? I'd say uninstall everything and go back to the original, install the latest drivers. Finally maybe the cable is screwy, try a different one. You can buy a cable fairly cheap at newegg. Network Cable unplugged ??
Try a different cable. If it still does it, then I'd say it could be your router.

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