Sorane

After some tests at the local computer shop, my Motherboard was deffective and I've had no way of knowing before that. Thank you for your help. Have a nive day

I tried to connect the GPU and the problem is the same. I've edited my original post

Hi everyone. For the first time of PC building I've hit a wall and I have no idea on how to solve this. I just got an almost complete new config : BeQuiet Dark Base 700 MSI MPG X570 Edge Wifi Ryzen 7 3700X NZXT Kraken X52 4x8 DDR4 HyperX Predator RGB LDLC QS-650+ Quality Select 80PLUS Gold (it's a SeaSonic but rebranded) RTX 2070 MSI Gaming Z (not connected yet) Edit : I connected it and the problème is the same Everything is connected correctly but when I triying to turn on the computer I have half a second of LEDs on the front of the case then the LEDs stop and then nothing happens. I've read that I don't need to connect all of the CPU power pins, so I've only connected the main 8 pins, I've of course tried to connect all of them after (+4) and with that nothing happens at all. Right now I don't have a lot more details and I have no way of testing if maybe some of my hardware has a malfunction. Thank you for your time, and if you need some more things, let me know