I bought a 7013-591 server a bit ago and would like to get it up and running. problem is when i turned the key to service mode and it started to boot, i heard a popping sound and it powered off. now when i power it on, the led lights up, displays a 004 in the led status and nothing else happens. i've already checked the fuse in the power supply and it's ok. trying to find out what is fried if anything.