Imediate Help plz

[iurytx]

I just tried to replace a hp with a 780i and its not working. Everything turns on but the monitor stays in sleep mode. I have tried 3 grafics card and none worked. can someone help me plz.

 

[Pck21]

I just tried to replace a hp with a 780i and its not working. Everything turns on but the monitor stays in sleep mode. I have tried 3 grafics card and none worked. can someone help me plz.

Wait, you replaced an HP board with what exactly? An nForce 780i board, a board with the model number 780i, what? We need more information before we can assess the problem.

Did you plug everything in on the board power wise? It seems that your video card is not getting powered or being recognized, but we don't know without more info.