Question Pc not turning on please help

Apr 10, 2019
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Hi, I recently did my 2nd build and it turned on fine, but when I connected a fan molex to my PSU it shut it self down with a snaping noise. I thought the PSU got fried but when I tested it out on my first build it turned on. So it's not the psu. The graphics card work and the ram works. But I couldn't test my CPU (it 6600k) or mother board (Asus z170 a)as I don't have spare Intel componants. So I need your guys help.
In summary I connected my fan which has a 3 pin and a molex connector. I connected the molex to the PSU and the 3 pin to the fan control. When I turned it on made a snap noise and shut it self down.

Please help. Thank you
 
Apr 10, 2019
2
0
10
First I had only the 3 pin connected, which turned on fine but when I connected the molex, it shit it self down ass soon as I pressed the on button