the li2735 is the bigger brother of the li2727, all you have to do is press a plastic knife into the plastic bezzel that covers the hinges after a bit of fiddling it should come free, once removed the keyboard should lift out, watch out for the ribbon connector as this can be easily damaged and undo the ribbon and your done reverse to re-assemble
Hi I have the same prblem on li 2727 bought new keybord put cannot get it to connect. The socket on motherboard as a row of pins and keyboard ribbon cable does the cable go under or on top of pins.robin