The i5 2500 came out Jan 9, 2011.
The Xeon E3 1230 V2 came out May 14th, 2012.
Support for Xeon was later added. Version 1401 and later has been validated to support the Xeon. Anything under that, and it won't work. I would advise downloading the latest BIOS. Do keep in mind there's a
slight dilemma. The Asus P8H67-M LX has been validated for the Xeon E3-1230. It did not explicitly state Xeon E3-1230 V2. There's also the fact this motherboard has no method to update the BIOS without first having a functional CPU. It does not have a EZ Flash button on the motherboard nor a EZ Flash dedicated USB slot. I've scavenged around the manual and there's nothing.
But, there's still a slight glimmer of hope. Lets assume your BIOS version is 1401 or above. First try disconnecting the power cord, switching off the PSU, then pulling out the CMOS battery (2032 button battery). Let it sit a couple minutes. Return everything to its proper place some time later then try powering on again. If nothing, perhaps the RAM isn't properly configured/incompatible. Turn on your computer then look for the MemOk! button/indicator. It is near the 24 pin connector. If you see the indicator continuously switching lights, you have a RAM issue. Simply push the MemOk! button if that's the case and hopefully it can sort things out.
www.asus.com
CPU Support, P8H67-M LX, Motherboard, LGA1155
www.asus.com