Blank screen after cpu upgrade

[livemine]

I just upgraded my computer from a Intel pentium D 3ghz to an Intel core 2 duo, now when i turn it on everything turns on but the system does nothing and my screen stays blank.

How would I fix this?

 

[maugusto]

Do a Cmos clear then restart the computer
But what are the rest of the system specs?

 

[livemine]

Do a Cmos clear then restart the computer
But what are the rest of the system specs?

This is all the information that I can find.
https://www.dell.com/support/home/us/en/19/product-support/servicetag/G0MVND1/configuration