Answer to: Broke the LCD data cable connection on the logic board.How about trying to replace the display cable? I've found original pieces coming from Hong Kong (I just replaced my keyboard like that). http://www.ebay.com/sch/i.html?_trksid=p... hope this helps
Answer to: Dripped coffee on laptop, keyboard not working?I´d recommend you to try as you said, an external usb mouse and keyboard, if those work then it means the computer is still working and you may need to replace the keyboard and the trackpad.
Answer to: My laptop powers off after adapter is unpluggedIt happens often when the battery life is over. You may need to replace the battery with an iFix it guide or, in case you do not intend to, get it replaced by an Apple tech.