Alienware X51 No Post No Beep

Everything on this computer powers up when I turn it on, but I get no display from the onboard HDMI or from the nVidia card.  No beeps either. 

I have cleared the CMOS jumper.  Disconnected and reconnected the CMOS battery.

I reseated the RAM one at a time.  Then I decided to turn it on with no RAM and I got the 2 beep error code that no RAM was installed.  This confused me.  There is some logic working somewhere to know that it had no RAM.

I don't have another Intel machine to test the CPU on.  Can anyone tell me what else to test?  Is the motherboard bad?

Thanks in advance for any help.