P8h61-m pro

Hello,
I´ve recently bought a new computer.
I have Asus p8h61 Pro and when i try to boot the computer it will start for like 6 seconds and then die and the MemOK keeps flashing.
But when i remove the RAM it boots, but I can´t get any screen on my monitor.

What can be the error? I´m really certain it´s the motherboard struggeling. Because i´ve tried all my other components and they work perfectly with another motherboard