There is absolutely no need to follow steps 8-13 if like me, all you needed to do was access the face buttons for cleaning/replacement. Once you have unscrewed the motherboard from the front casing you can just flip it up, making sure you take the front screen with it. You will have full access to the buttons and all of their contacts. No need to remove the wifi board and microphone cable, etc. Also, replacing the ribbon cables for the screen is especially frustrating. Avoid taking them out at all costs, if you can.