Not too great with computer hardware, just an FYI before I tell you about the problem. 
When I try to turn the computer on, I press the button and nothing happens, nothing at all. No lights, sounds, or movement. I'm thinking it's the power supply, but when this happened before (about 6 months ago), I was told the motherboard is no good. Can anyone explain how that might happen?
When I try to turn the computer on, I press the button and nothing happens, nothing at all. No lights, sounds, or movement. I'm thinking it's the power supply, but when this happened before (about 6 months ago), I was told the motherboard is no good. Can anyone explain how that might happen?