Indicates: no signal. And the keyboard and mouse don't work. What to do?

Question

Iron

Hello, I just assembled a PC, here are the components:
Amd ryzen 5 2600
Deepcool gammax 300
Asus tuf b450-pro gaming
Ssd 240 gb kingston a400
1 tb wdblue
8x2 adata xpg gammix d10
550w corsair rm550x
Rtx 2060 inno3d gamming oc x2 6gb
Cougar m339 black
I collected everything, connected it, double-checked it. I turn it on, everything works, all the vents, everything is on, but there is nothing on the monitor / TV, and also the keyboard does not work. I don’t know what to do, I’m collecting for the first time, but everything seems to be correct. Please help, I will be very grateful.

Answer 1

Are all the auxiliary power connectors connected on the vidyuhi? Are all power connectors connected on the motherboard?
You can try to reset the bios with a jumper on the board, maybe there are some settings left if the board was tested with other hardware.