T7400 second physical cpu not recognized.

Hi Everyone! I've been googling for similar scenarios and havent had much luck so here's the run-down.

• T7400
• Two Xeon X5482 Quad Core processors installed.
  • Stepping is matched
• Worked when originally installed 2+ years prior to this post, would show (2 processors) in system properties.
• HDD was going bad at one point, bought SSD and cloned original HDD to SSD put SSD in and off we go.
• Unplugged machine for a year or more, plugged back in runs fine but only one of the CPU's is being recognized by the system.
• Windows 64 Ultimate.

I have done the following things per what I could find online.

• Re-seated the cpus and applied new thermal paste.
• Reset the CMOS.

I currently am unable to setup a monitor to the system to reach the bios as some threads mention checking there if it shows two processors, I have also not yet swapped placement of the CPU's to see if it just doesn't boot that way? Unsure what that would check.

Any ideas on what I can look for while waiting on my HDMI to VGA dongle to arrive so I can check the BIOS? Or any idea on what might cause it to work and then no longer work? Basically I can buy another set on eBay but I don't want to do that and put them in to find the MOBO is bad, how can I verify where the problem is?

Any help would be appreciated!