Yeah I've tested all these things at this point. I went ahead and took it to a repair shop to see if they can tell me anything else. Thanks everyone!IN working off of one of 2 sticks of ram only, it may matter which slot you use. Also, have you tried running the on board video? Does your mobo have an LED display that can show problem codes? Does the PSU power up? Could you have one or more bad PSU cables?