This is my first time building a PC, and I followed tips and all the guides mostly from youtube videos and followed the all of them step by step. And I plug the AC power plug and switch on the power, the mobo and gpu has lights indicating that it is being powered. But I am unable to get all the fans to work (pre-installed fans in the case - Tecware Titan, bought it for great value), including the Corsair H100i v2 liquid cooler that I've just bought from Amazon. And when I press the power button on the case, nothing happened, LED light on the case is not lighted up also... any idea?