Just upgraded my cpu from an i5 7400 to a i7 7700 and my PC isn't posting. The EZ Debug is now flashing from DRAM to VGA, pausing for a moment on VGA before it quick flashes back to DRAM. I've tried reapplying thermal paste, reseating my RAM, taking my GPU out and using onboard graphics, switching back to my previous processor, resetting CMOS, putting my RAM in slot 2 (that changes the light to a steady VGA) as well as checking my pins are connected. I have no idea what the problem is right now and would like some assistance with this. I'm not sure what the BIOS is and I can't get my PC to display anything to check IT. I do believe I updated it to the latest version when I built it back in April. Video of what happens when I turn it on.
https://youtu.be/RmX9ksuIH0M
https://youtu.be/RmX9ksuIH0M