Recently bought a Dell GX520 on ebay. Received it today and it wont turn on. Figured I'd check and see if anyone has any suggestions of what the problem might be before I message the seller. When I press the power button nothing happens at all. I tried a different power cable, same result so that is not the problem. The "AUX_PWR" light inside turns on when the power cable is plugged in so it gets some kind of response. I really don't have enough computer tech knowledge to know if any plug inside is is out of place. Any ideas of what to look for? thanks.