I was asking because my wife had a Gateway laptop which had the same problem as yours. Long story short, the power contact that went loose is soldered to the motherboard, and the looseness meant that it was breaking apart. It broke once, we got the mb replaced (you need to replace the whole mb for that little piece of plastic crap), and it broke again 9 months after (this time, the contact blew up, because it was shorting and the heat made it go "bang"). We didn't bother with it after that.