I am suspicious of the power supply but uncertain. Panel led lights up when power is connected. Front led screen lights up but circle slash action when hitting power button. I have never had power supply problem b4 and this is new. I replaced motherboard and no different. What are the chances of getting 2 bad mother boards. What about the CPU. Shouldn't something happen. beep, fans, something. Please help, I was really jazzed about adding this to my home theater, with plans of many upgrades. Am depressed now just thinking about it.