Switched Computer cases, Now wont boot.

Hello,
I would first just start off by saying I'm fairly knowledgeable about computers this one I've had for years I made it myself. Last night I swhiched my computer from one case to another. When I turned my computer back on after plugging everything in just like it was before I get a black screen of death.

I've reset CMOS, I've tried to reset RAM via moving them around and only trying to use one stick at a time. but when I turned my computer on with no ram sticks it didn't beep or anything to let me know something was wrong could my mobo be dead?

I've also turned on my computer without my CPU fan runiing to see if it was my CPU and sure enough my CPU doesn't get hot Or warm. On the attempted boot I get the famous FF code and I can hear my rom's and hard drives winding and such. I have tried booting with minimal hardware as well but not luck.