TryItOut666,  The issue you are seeing is due to the riser itself that is installed in the server. There are couple  possible risers for the system, they are ones that work with either a Single Processor, or Dual Processor. I believe the risers you have installed are meant to only work in a single processor environment.  If you private message me the Svc Tag I can verify the hardware installed. If you follow this link, on page 60 it goes further into the 2 different risers - [URL] Let me know.
Hello all! I had a server PowerEge R520 in my organisation. After i have install a new processor, RAM & heatsink, as soon as I connected to electricity, on the forward panel, I saw LCD message."HWC2005: System board Riser cable or interconnect failure. Check connection."  Server turn on correct, but this message disturbs me. What the "Riser cable" is ? And what I must doing for stop that? Thank you for helping me.
HWC2005 system board riser cable or interconnect failure