Pc isn’t staying on when I turn it on!

[Brodiemmore]

Hello this is my first time building a pc and it was running just the other night but today I was trying to move around the cables so it looked better and when I tried to turn it back on the RGB lights on the fan turned on for half a second and then turned off. Nothing else turned on and the fans didn’t start. I have made sure basically everything is plugged in and I am just wondering what could be wrong. Also I just bought all of the parts new.

 

[managed]

I moved your thread to the Hardware forum where you are more likely to get appropriate help.

 

[Macboatmaster]

but today I was trying to move around the cables so it looked better

which cables please
also please provide with links
motherboard
cpu
gpu
case
power supply
details