When in doubt...reset CMOS...no seriously...reset it.
When your computer does not boot. When no image comes on the screen. When it does not go into your bios. Do yourself a favor and follow these simple steps to trouble shoot.
1. Check RAM slots: the number 1 reason for no boot in a computer is when you didn't plug in one of the RAM in correct. So do that.
Did that fix the problem? no...read on.
2. Check the 4pin or the 8pin power connector make sure these are plugged in. these are the second most common problem to a "no boot" computer. Also check the CPU fan. Some mobo will not start if the CPU fan is not plugged in.
Did that fix the problem? no...read on.
3. Check Video card and Power connectors to it. You may also want to check and see if you have a working card by applying to another computer if have one. Or move a known working card from another computer to yours.
Did that fix the problem? no...read on.
4. Reset the god damn CMOS. It resets everything in the BIOS to default. giving you a safe boot.
This should be able to fix the problem. If the problem persists. then you should probably look to a professional or RMA your poor board.
(There are other small things i didn't cover such as check power supply and us MemOk! from specific boards.) I ran into problems with my computers and learned these the hard way. hopefully this was a fun read for ya'll.