If your server has this riser: DXX7K Riser 1- X16 Slot (Used in 2P Config).   Then it will throw the error, since its looking for the 2nd CPU. .  Will your server go past the error and run?  Regards,
Hello all! I bought the new server PowerEge R520. Аs 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.
Errore - "HWC2005: System board Riser cable or interconnect failure. Check 
connection." on new R520.