New build- no video

[gustav_krklec]

I have build a new PC. Procesor is installed, memory to, ATX power connector ( 24 pin) and ATX 12 V 4 pin connected. When I start my PC fans are working sound is comming but no video signal on any video output ( VGA/D-sub or VGA/DVI-D) I have tried with and without Video card ( Radeon HD7770) stil no video output. Tried with a separate monitor ( Samsung SyncMaster BX2431) and stil no Video output from motherborad.
What have I done wrong?
/G

[gustav_krklec]

Hmm, I thought that my HW-setup is following. Well here it is:
ASRock H61M/U3S3
Intel Core I5 3450 3,1 GHz 6MB S-1155
Asus Radeon HD7770 DirectU 1Ghz PCI-E
Kingston 4GB 1333MHz DDR3 CL9 ( x2)
Intel 2,5" 120GB SSD SATA/600
Segate barrakuda 1TB 7200RPM STA/600
PSU Antec HCG-620