Edit
Step 32
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There are six screws to remove (if you have an iBook without Firewire the screw circled in orange will not be present):
Two short, flat-headed Phillips screws near the battery compartment.
One short, round-headed Phillips near the speaker cable connector. (This is present on some models, but not others - especially the older ones)
One short, flat-headed Phillips between the ethernet and USB ports.
One short, flat-headed Phillips to the left of the hole-y (polite laughter) area.
One long, round-headed Phillips screw near the power receptacle.
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