Original post by: Alex Jansen ,
Cable 3 is pretty difficult to install, Be very gentle and kind of push into the bottom and drag the cable up into the slot. Using a [http://www.ifixit.com/Tools/Spudger/IF145-002|spudger] really helps. If you still can't get it in and are convinced it i broken you will need to replace the logic board. We don't sell it, but try eBay.