Umm... cpus dont have plugs! What you mean to say is psu (meaning power supply unit)
1 hour ago, zed787 said:
The extension still works. Any help?
So does the computer work? Sounds to me could be power surge.
Have you tried different power outlet?
With extension cords best to plug extension cord in to power outlet first and then plugin/turn on monitor and psu one at a time.