First, is the computer getting power?
Lights on, fans spinning, etc.
If yes then try removing the RAM first and see if you get beeps.
If still no beeps, remove CPU, and see if it beeps.
If still no beeps then motherboard is bad.
Sounds to me a bad motherboard or a bad video card. You are not getting any beeps so far and the way you posted your thread, you are getting power. Check the video card and see if that is the problem. replace with another and test it