problem is in the title. no idea why but had my pc at the shop to troubleshoot why it wasnt booting up at all (no fans lights or anything). went to pick it up today and it was working at the shop! i was stoked, they even gave me the same power cord they were using in case mine was bad...get home AND NO BOOT AGAIN!!! i even tried plugging into EVERY SINGLE OUTLET in my entire house and none of them got it to work. what could possibly cause this?!?? PLEASE HELP