Hackour wrote1-try connect the monitor by the build in VGA port
2-Power supply may be damaged (even the LEDs and fans work fine ......).
3-MotherBoard may be damaged (Northbridge).
Thanks for the suggestions:
1- done, no signal.
2- Tried a whole different working PSU, same problem.
3- This is most likely the problem.
I tested my CPU on another system and it worked... I ordered a new motherboard since all components were tested and working.