I shut my computer down earlier this week and it won't boot up. I push the button and nothing happens. No fans or anything. The only thing that comes on is the green light next to the plug in the back. And the funny thing is when I unplug it, the light stays on for up to 30seconds. And it was blinking at one point. I've tried the voltage switch, cleaning out the dust, changing the battery, checking the wires, had my harddrive tested, changed power cords and still nothing. I was told that if it was a motherboard issue, I would hear a beep code. And I never heard any beeps. At all. Does it sound like power supply issue? Also, a few weeks ago, it shut down randomly and kept doing so immediately after I'd push the power button. It finally stayed on after a few tries. I do believe it's related. By the way, I have an HP pavilion slimline s7700n.