Power won’t turn on

Dec 1, 2018
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So basically my power won’t turn on. I have checked that the power cable fits nicely into the psu and the switch is on. This is after I replaced my old parts with these newer parts. I think the problem might be the front panel connectors, I don’t think I plugged them in right and It doesn’t show how to in the Manuel.

Specs:
Asus Rog strix z390-e motherboard
Trident Z rgb ram 2 8gb sticks
Intel core I7-9700k
Noctua NH-D15
Gigabyte 1080 ti
600w psu
 
Dec 1, 2018
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Sorry for replying so late.
Ok so my case is a Raidmax Monster II ATX.
I seem to have all the necessary cables as far as I can see. That includes the 24 pin motherboard power cable, 8 pin cpu cable( I only have the 4 pin connected right now), and the cpu fan cooler cable.
The extra cables that are plugged in are the 2 sata cables for my HDD, USB 3.1 cable, audio cable, gpu power cables, and the little front panel connectors.
I found the page(1-20) with the name of the power connectors and plugged them correctly like it said in the manuel, but there is still no power.
I don't want to test the PSU in fear that I may brake something, but it seemed to be working fine the day before I replaced the parts. I mean its only like 1 or 2 years old.
 
Dec 1, 2018
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Its because the 8 pin was split into 2 4 pin cables. My old motherboard only had a 4 pin slot.
Ok I plugged the 2 4 pin cables to make an 8 pin cable, but my pc still isn't turning on. I think the power switch might be broken. Is there another way to turn on the pc without the switch?
 
Dec 1, 2018
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Thanks I will try this later.
Hopefully nothing goes wrong.
Is it ok to leave it on or should I turn it off right after?
Also if everything does turn on, could the problem be the power switch?