Both 17-inch MacBook Pro keyboards utilize flex cables that are incompatible with previous PowerBook G4 keyboards. Also, this flex cable difference renders the 15-inch MacBook Pro keyboard incompatible with either 17-inch MacBook Pro model.
The MacBook Pro (17-inch Core 2 Duo) keyboard backlighting has been improved over the MacBook Pro (17-inch) model. In addition, the programming of the caps lock key was changed to fix a developer keyboard mapping issue, and thus cannot be used in the previous MacBook Pro (17-inch) or the caps lock key will not be recognized.
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