When you take apart the unit to repair the top screen you'll notice some ribbon cables. The wide ribbon cables go into the clip only one way so there's no problem with them. There is a really small ribbon cable hidden under the wide one. When you put it back together, you have to push the cable in over top of the clip as opposed to underneath which you would normally think of doing. There is a small groove on top of the clip that the cable fits into perfectly. If you put it in underneath, you won't make a connection and the unit will immediately turn off after you turn it on.