Motherboard/power supply issues. Rig wont power on

[tappyb18]

I have an asus b250 mining motherboard and an evga 800 watt power supply and i am just trying to test out 2 nvidia 1070s.  When i get everything hooked up and test the power supply when it is connected to the psu tester and NOT the motherboard it powers everyrthing up fine, but when i take the power connectors and plug them to the motherboard i do not get anything to power up afterwards. any suggestions please!?? i am very new to this and is my first minor build , Thankss!!

[boyptc]

I'm not sure if this thread should be here but are you sure that all of those plugs are connected on the motherboard?

If doesn't get any power up then there's a power issue, check all those power cables/connections.

[book1483]

Confirm your motherboard connections are fully set.
If no loose connections then its possible you got a bad motherboard.