To the original question: What are the extra 2 cable from the 1Ghz iBook that 1.33GHz doesnt have? Those 2 are the reed switch or sleep switch. In the last revision of iBook 12" Apple relocated the switch by switching location with the magnet. Meaning instead of reed switch on the LCD, it's the magnet. So less 2 cable to go through the tiny hinge space.
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