Hi, If you have tried all of the steps in that article including taking it to minimum to post it most likely is a system board failure.
The server powers on and i see the hard drives light up for a brief second....but no POST, no video no nothing.... I've re-seated all of the drives, the memory, and the cables attaching the drives to the motherboard and backplane (waiting the 2 minutes to power on after I've put the power cables back in) I've re-seated the power supplies I've tried in order the steps here including removing the drives and the optical drive before powering on and still no luck: [URL]#4 any suggestions to resolve are appreciated - thank you
PowerEdge R715 server won't POST - no lights on the hard drives except for a 
quick flash when i turn on the power