New pc but no display

[Demonhax]

So i just built a pc for my girlfriend to play league on. But when i turn it on it wont show anything on display.

i tried another display, gpu and ssd to se if anything changed, but it didnt. 
 

anything else i can try? 

[PineyCreek]

Got a picture of the back where the cables are connected externally?

 

Is the monitor plugged in/turned on/connected to the computer?

[Demonhax]

4 hours ago, PineyCreek said:

Got a picture of the back where the cables are connected externally?

 

Is the monitor plugged in/turned on/connected to the computer?

Got it to work, it was the ram sticks. Could have 2 different ram sticks in.