Computer HP Pavillian won't start

There's a problem w/ the unit since you have a green light, it means power pushes through

try another cable. if that doesnt work then it has been damaged the plug in the power supply quick fix if the cable doenst fix it replace the power supply. u can find a 350 watt power supply on craigs list for 10-20 bucks. If you can handle replacing the power supply. If you want to try that and need help I can walk you thro it.