Need help building gaming pc. Ports dont work after building but worked on first boot.

ISA1AS3000

Reputable
Jul 10, 2015
2
0
4,510
I recently built a gaming pc and got it to boot once but after I turned it off once now the ports don't work like usb and hdmi.

I have:
gigabyte 970a dsp3 mobo
amd fx 8320
radeon r9 280x
cx750m psu
crucial ballistics 2x4gb 1600mhz

I have replaced the psu and the mobo so they should be fine. What can be wrong?