Hey all I'm new to this forum but I've built a few computers in the past but have never experienced any problems like this. Case: Powerspec Cooler master case Processor: Intel i5 750(quad core) Motherboard: Gigabyte H55M-UD2H Powersupply:OCZ 500 watt Mod X Stream-Pro Here are some pictures of my build and a video of what is going on. Video: youtube.com/watch?v=UbuFZJQnlds As you can see the PSU, CPU, and Case fans are turning on and the Motherboard LED lights are blinking and then they quickly turn off. I dont think its a problem with the Power Supply because I have already returned one with the same issue thinking it was defective. Pictures: wont let me post pictures =/ Any help is appreciated, thanks for your time!