I disassembled my PowerBook G4 and put it back together. Now it doesn't power on at all. The only thing I can think of is that when I was assembling it, I broke a leg off of the small locking clip that connect the keyboard/power ribbon cable to the board. I'm thinking it's not applying enough pressure to make contact. Where can I find this small piece? The top red arrow in the photo shows the piece I need.