I just bought a new PSU, its the HIPER HPU-4M730-SS EPS12V v2.91 730W Power Supply 100 - 240 V http://www.newegg.com/Product/Product.asp?Item=N82E16817128008. When I plug it in, nothing is working. I dont hear any fan noise or anything from the power supply. The box says the voltage is 100-240. if its 100-240 it will work in the united states, correct?