Fans/Motherboard not turning on

[ashtraiy]

hey, so im building a pc and i've hooked up everything... only things im waiting for is thre graphics card and cpu.... but the thing is when i plug everythig together and try to start it up the fans should spin.. but they dont and i was just wondering what i can do to fix this problem ... (Case: Nzxt H510)
(Motherboard: Rog Strix B450-f)

 

[pr0ph3t]

hey, so im building a pc and i've hooked up everything... only things im waiting for is thre graphics card and cpu.... but the thing is when i plug everythig together and try to start it up the fans should spin.. but they dont and i was just wondering what i can do to fix this problem ... (Case: Nzxt H510)
(Motherboard: Rog Strix B450-f)

You will need to install the CPU for the case fans and motherboard to turn on.