need help, screen not recognizing a connection

I just finished building my first computer, got all the updates for 7, and moved on to setting my bios from factory1333 to 1600mhz for my ram, as soon as I saved and quit my monitor turned off and is no longer detecting a connection, I did not change anything else in the bios that I know of.. what can I do to fix this?? Also I think I may have set them to 1800s on accident.. would that be the reason?

 

Hi,

You can unplug the machine and remove the coin-cell battery for a minute or two to reset CMOS to the defaults. Then put things back and make one change at a time to figure out which setting caused the problem.

 

Thanks much! that was just what I needed, it works great now!