Attached to this post are PDF's of the service manuals for some of the PowerPC-based PowerBooks. Enjoy
powerbook_1400_series.pdf - PowerBook 1400c/117, /133, /166, PowerBook 1400cs/117, /133, /166
pb_1400_screw_locations.pdf - PowerBook 1400 Series screw locations
powerbook_2300_series.pdf - PowerBook Duo 2300c
powerbook_2400c.pdf - PowerBook 2400c/180
powerbook_3400c.g3.pdf - PowerBook 3400c/180, 3400c/200, and PowerBook G3
powerbook_190.5300.pdf - Macintosh PowerBook 190/66, 190cs/66, 5300/100, 5300cs/100, 5300c/100, and 5300ce/117
powerbook_1400_series.pdf - PowerBook 1400c/117, /133, /166, PowerBook 1400cs/117, /133, /166
pb_1400_screw_locations.pdf - PowerBook 1400 Series screw locations
powerbook_2300_series.pdf - PowerBook Duo 2300c
powerbook_2400c.pdf - PowerBook 2400c/180
powerbook_3400c.g3.pdf - PowerBook 3400c/180, 3400c/200, and PowerBook G3
powerbook_190.5300.pdf - Macintosh PowerBook 190/66, 190cs/66, 5300/100, 5300cs/100, 5300c/100, and 5300ce/117