
Step 9
Do not yank the upper case off quickly. The case is attached to the logic board via a ribbon cable.
Lift up at the rear of the case and work your fingers along the sides, freeing the case as you go. Once you have freed the sides, you may need to rock the case up and down to free the front of the upper case.




there are 2 push buttons inside the harddrive bay which release the front of the upper case.
this is an annoyingly difficult step. it is VERY hard to get the front part off without bending the unit improperly. Would be great to know where the two "push buttons" are.
On my MacBook, there were no pushbuttons. Rather, two mini phillips screws were holding the case on inside the battery bay. The two screws are under two ball-bearing-like nubs that help hold the battery in the bay.
I just realized these were the screws mentioned in Step 4, which I missed originally. Did you miss step 4 too?
I discovered that I didn't need to take the case off completely. I just propped it up with a small screwdriver and was able to remove the airport card and replace it with a new one fairly easily.
That's not so difficult step. you shoul know , that front edge of upper case holding only on 5 plastic "locks" 4 in front edge upon the superdrive, 5-th near the "sleep light, open laptop button"
just lift up the rear edges of upper case to 35-40 degrees
[I d just say carefule on the prising open - these are fragile screw tab fixings joined to the uppercase. - Patience and gentle pressure and all works fine .
Getting the top case off, especially right above the optical drive slot was a @#$%^. !^$%. Was finally able to work it loose by twisting in the budger. Be careful.