My keyboard / mouse won't connect to my newly built pc

bo7amod

Prominent
Dec 3, 2017
1
0
510
I just built a new pc, the specs are
CPU: i7700k
GPU: gtx 1080
PSU: 750w
RAM: 16gb ddr4
Motherboard: Asrock z270 extreme4
So I recently built this pc and haven't even booted it yet, the pc does work and even the RGB lights on the RAM are working, but it won't recognize my keyboard or mouse and won't connect to it even though when I connect my phone to the pc it shows that the phone is charging, the pc starting with a single click but when I need to turn it off I need to hold the power button. the cpu fan is working , the gpu LED lights are showing, but also there is a red light showing from my motherboard and I can't get to the BIOS because the keyboard won't even work or my mouse which both work on my laptop