Welcome to the forum,
Please post your specs it will help us to help you.
Check your CPU pins and look if some are bended.
Reseat you CPU
Be sure that all power sources for the motherboard are in place (the big ATX plug, the one near the CPU and the auxiliary sata power plug)
Recheck if the case wires to the mobo (reset, on switches) are at the right places and plugged correctly.
Check SATA Cable
Remove discrete video card
Plug your monitor on the onboard graphics of the mobo.
Put only one memory stick first.
With PSU power off, cord off, reset CMOS.
PSU power ON 30seconds before booting then boot
Load optimized settings in the BIOS (F7) and save settings(F10)
And Yes ..when you boot you should have as last code "A0"
Please post your codes
If it boots OK...add the other components one at a time
If you still has a no go....boot on the secondary BIOS. The switch for booting from secondary BIOS is a bit left of your LED code display.
Hope it helps