The problem that you are experiencing is not related with the processor, if the system is properly posting and you are getting video display this means that the desktop board is detecting the processor. Also remember that using the processor on a damaged system will void the warranty.
What you can do is to contact the motherboard manufacturer for assistance
You know, i had this same issue, but guess what the issue was?, my finger touch the contact a little bit, i could not beleive that caused the issue.
But make sure your contacts are correct, and the contacts are clean and free of dust or gunk.