Hi again guys after an earier post about a Dell 4550 i was giving it a good spring clean and noticed when i plugged the power back to it and pressed the power button nothing happened no led ligth nothing, thinking i had distured something i reopend the case there was power to the M/B i could see a little green light on but still nothing else. I had left it for about five mins and it decided to power up and loaded as normal. Cloed the case again and shut down took out the power leed for a while,reinserted the power leed and pushed the power button and exactly the same nothing leave it a few mins or so and it powers up and loads windows normaly, normal beep at post. Any thoughts????????