I got this laptop through a series of people, and when i recieved it, it would not work. When you plugged in the AC adapter, the light would come on for a few seconds and then turn off. So i opened it up and re-soldered the AC plug on the little daughter-board that is in there. Now when i plug it in, i have to tilt the AC adaper upwards for it to make a connection but neither the light nor the screen come on. Do you have any ideas past getting new parts?