New build: no fans spinning only front led on...

The pc has 5 fans including front, back, gpu, cup and psu. The mb has 1 or 2 fan connectors... When I
Plug it in nothing happens only the power button led on the case comes on no sound no nothing
 
Are you powering all 5 fans from your 2 motherboard fan connectors? If so you could drawing too much power from them, try unplugging them and seeing what happens (leave your CPU fan plugged in!).

Also, does your computer beep at all when booting? And when you say the PC turns on, does it stay on or shut its self down?