Since you have a Rampage Formula, use these:
See the reset and power button? Try those, if it STILL doesn't work, something is either shorting, or your power cable to the button has a problem. Or maybe you're placed the plugs into the wrong slots?
You have an E-Z Connector, check you've done it right.

See the reset and power button? Try those, if it STILL doesn't work, something is either shorting, or your power cable to the button has a problem. Or maybe you're placed the plugs into the wrong slots?
You have an E-Z Connector, check you've done it right.