You have to disassemble the whole notebook till motherboard & then replace the jack using fan/low temperature solder. It's rather simple for a equipped professional (soldering station/fan), but difficult for a newbie without equipment. I've recently forgot my DC adapter at my father's apartment and had to power it from external power supply. Just soldered two wires & powered it up. But without good soldering station it's almost impossible(you can damage the whole power circuit - be careful).