I should have included that It had all worked just fine for about 7 months prior. Tried swapping out everything but the CPU and motherboard since I don't have replacements for those. Removing from case was ineffective.
About a week ago my computer froze or appeared to freeze. The mouse wasn't moving but before I reset i realized that neither keyboard nor mouse was receiving power. when I went to restart it all I got was the Check Signal Cable error on my monitor.
I am using EVGA nForce 780i SLi FTW...