Display not receiving after going into bios

Hello,

DNA here I am looking for any help because at the moment I am receiving no display on my LCD monitor it works and all I just messed it up in my bios with something about primary video and I can not reverse it, I need a solution that allows me to fix this problem for well it's a new computer and well I'm being the nooby that I am wanted to see what the whole primary video thing was all about and hit IBM something then exited saving the stuff, now when I start up the signal is not found meaning I screwed myself up . Please help me much love DNA.