Fans blip on then turn off -- think is power problem somewhere.
Standard debugging is to pull all USB devices and network cables off PC. Try again. When it fails, open case and pull all PCI cards including video cards. If it works it will beep a code for 'no video' or fallback to integrated video (google beep codes). If it beeps or works to integrated video then try re-inserting the cards you took out. Sometimes reseating the cards fixes the problem, other times a card is bad and needs to be replaces.
If the pc is still dead with all the cards pulled take out the memory. try again you are hoping to get the beep code for 'no memory'. If you get the beep for no memory then insert the dimms one at a time until you isloate the bad memory.
If the pc is still dead (no post, no pbeeps) when the memory and pci cards are out, then you have problems. its pwoer supply, MB or CPU. usually try swapping them in that order. It's never the CPU, it's more likely the power supply (PSU) than the MB.
Good luck.
Here is good background reading.
http://www.tomshardware.com/forum/261145-31-perform-steps-posting-post-boot-video-problems