|"I did an external build and there was nothing"|
By that do you mean benchtest? Unfortunately you didn't list your specs, but when benchtesting, all you need is the power supply, motherboard, CPU w/HSF, one stick RAM, graphics card (or onboard graphics), monitor, & keyboard. Nothing else. If you can't get that setup to boot & bring up a display, it's time to start troubleshooting. Do you have a decent quality power supply?