Question Pc no display

[internetskrub]

Ok, so i upgraded my old psu to a newer 600w one to accommodate my rx 570 card. After assembly, i tested the pc.
It powers on, fans are all spinning, but for some reason it wont show display. What should i do?

P.S: prior to upgrade i removed every single component including the ram, processor fan, etc.

 

[CountMike]

Ok, so i upgraded my old psu to a newer 600w one to accommodate my rx 570 card. After assembly, i tested the pc.
It powers on, fans are all spinning, but for some reason it wont show display. What should i do?

P.S: prior to upgrade i removed every single component including the ram, processor fan, etc.

Well, obviously you didn't reconnect something right.