My Dell latitude D600 was plugged in and cord was snagged with foot thus yanking the laptop. My question is....is this a common problem for MB to short out? I pulled individual components to try and find out if anyone was at fault. Well I'm down to the MB frame and still my power light goes out on my power pack as soon as it's plugged into the board. Is this a common problem or an easy fix or should I goahead and buy a new/used MB W/O ram and CPU off e-bay for $150 ?