New pc dont show anything

BELLATO

Honorable
Jan 25, 2014
3
0
10,510
I just bought new pc
H81M-HDS
I5 4570
gtx 660
8GB ram

Connected to monitor and on turning on, it dont show anything. I tried plugin from flash win7 64x , mother board cd copied and also type all keys but nothing happens. I hope someone can help me.
edit: and everything is running (hardware)