If it POSTs (one beep) then everything is in order as far as CPU and RAM. I would double check the monitor settings (if it has analog and DVI inputs) to make sure it is set for the one your using. Also, if you have another cable (VGA or DVI, once again, which ever you are using) and check that. DVI cables are cheap (under $10(US)). It is funny because the motherboard should autodetect if you are using the IGP.