Question PC Not Getting Power (No Lights At All) After Changing Motherboard, CPU and RAM

[sakifan]

Hey everyone, I've had my PC for about 3 years, built it back in 2021, and got a new GPU recently (rtx 4060) and everything worked fine, but recently decided to change the mobo since it was outdated, and the CPU as well along with it. (Gigabyte Aorus B650 Elite AX mobo and AMD Ryzen 7600x CPU.) I also had to change the RAM because my previous 2 16gb sticks were ddr4 and my new board is ddr5. The issue is that even plugged in and with the power supply turned on, i seemingly have no power at all, no fans no lights. Im pretty sure i plugged in everything, except a 4 hole connector cable that i found under my motherboard that i have no idea where to plug, and the usb 3.0. Cable that i seemingly just have no room to plug (Phanteks Eclipse P500A). I took precautions to not fry any of the components. Anyone know what to do?

 

[rgd1101]

did you follow the motherboard manual instruction?

 

[sakifan]

did you follow the motherboard manual instruction?

I think so? Looking at it the only issue i could see was the front header panel connectors, is there a certain orientation for them? (Facing inside or outside of the slot)