Error: Baseboard management controller communication failure ? Help

Hi,

I have two Poweredge R805, and I bought them yesterday, server came showing this error during boot:

Baseboard management controller communication failure

But it boots ok and proxmox as well as any other os just fine, boots from usb, I can get into the F2 menu (NOT F10 doesn't work) normally. I also both servers give me the same error and I tried reseating everything and no go.

Can you please tell me what that error means? and how to fix it? It makes my fans spin at full speed and its too loud when it shouldn't be.