I'm sorry that you're having trouble with your keyboard. Unfortunately, Apple (we all know the designers at Apple can do this if they are feeling dubious) has decided to embed the keyboard in the upper case in your model, and the keyboard cable and assembly is in the upper case. Depending on how many repairs you have done before, this could take anywhere an hour for experienced professionals to three hours for beginners. If you want to proceed, you can use this guide ([guide|6318]) to try again. You also may want to reseat the battery connector before trying. Hope this helps.