*First time on this site* Coming to the end of my new build but I've encountered a problem, I had nearly all the parts for my new gaming pc, except the graphics card, and storage, so i could only access the bios. Today my ssd came and so I expected to plug it in and install windows with my windows 10 usb, however when I plugged in the ssd my computer did not boot properly, the bios did not load(nothing on screen) and also no usb devices are getting power, the motherboard is on because I can see the led light on the buttons are light up, but the dial which displays the cpu temp is at 00 which suggests I have a problem with either the mobo or cpu, another issue is that once the pc is powered on I cannot turn it off with the case switch, it has to be turned off via psu, I thought maybe when I plugged in the SATA to the ssd I may have knocked a wire out of place, but I've gone over everything and cannot find the problem. Please help I'm not great with computers this is my first build.