It's easy to get the case wires configured to the mobo headers, understood. I've done numerous builds and I deal with this situation by taking out the motherboard manual. Install mobo and wiring step by step. The case usually arrives with limited documentation and their wiring is always different than other cases. Go to Newegg, look up the case model, click on manufacturing page, download the case manual and print out the page that shows the header connectors. Between the case wire instructions and the motherboard manual header pins, you'll get it. Usually, the motherboard pins are a top row of pins, and a bottom row of pins. The writing on the wire connectors usually face each other on the centerline of the 2 rows of pins.
Before all this backchecking, make sure you didn't forget to plug in the 4pin CPU plug from the psu into the motherboard just above the cpu socket. Without it, it won't power up. Its easy to forget. g L
if i plug the POWER SW labeled cable into the mobo -PW+ pins it should power on from that?
both of the ATX connectors are plugged.