FIrst build won’t start?

Jun 21, 2018
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So this is my first build, but I had a friend with some experience help out and we believe we have everything plugged in correctly and everything that needs to be hooked up. When I flip on the power switch, (idle) the only thing lighting up is the gpu, the psu fan doesn’t spin, the cpu cooler fan wont spin and when I turn the pc on from the case, nothing happens either, the only thing showing a light up is the gpu. Could I be missing a connection? I used pc part picker and everything is compatible and my psu should be plenty to power it all.