Ursprünglicher Beitrag von: Chris Green ,
I'd be willing to bet that that component isn't what went bad in your machine. Before attempting a risky and difficult repair on a board that (for the most part) probably works, look into replacing the top case or repairing the keyboard. You shouldn't have too much difficulty popping the shift key off, just remember not to use excessive force, that's your worst enemy when working with these things. From there you can remove the key mechanism and clean things out. That may be all it takes. If that doesn't work, you can also replace the top case, iFixit sells it [product|IF163-027|here] and you could also probably find it from other vendors as well, probably without the same warranties though. As a side note, I've never worked on these machines but it may be possible to separate the keyboard from the top case and replace just that. It would definitely be cheaper but someone with more experience might be able to give some better insight than myself. It looks like just the keyboard assembly is available on [http://www.ebay.com/itm/Tested-APPLE-Macbook-Pro-Unibody-13-A1278-Keyboard-with-backlight-2009-10-11-/280842043460?pt=PCA_Mice_Trackballs&hash=item41637d8044|eBay] if you want to pursue that option.