ok, here's the deal: working in a Dell Inspiring 518. looked into all kinds of info and ran a shot test on the power supply and all sources and tests pointed to a dead motherboard. so I went and got a new mobo. made sure it was the same exact model as the original. easy enough to do. mobo arrives, and I go to work switching it out. make sure I ground myself before working and periodically throughout. keep my fingers off all strips, pins, and plugs. get everything moved over to the new mobo and get the mobo situated in the chasis and all of the wires connected properly. I took pictures (lots of them) of the original set up so I could be sure beyond shadow of reasonable doubt that everything was plugged in where it was supposed to be. closer her up and power on...... nothing happens. not even a flicker of life. look on the back and the green power light is on. pop her open again and the little yellow light is on on the mobo. what did I do wrong? what other problems could there be?
tried removing the ram and turning the thing on. still nothing. I don't know what else to do. :( Help me Dani-WAN-memphis. you're my only hope. thanks.