Apple powerbook g4 12 inch 1 33ghz User Manual

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 Top Case7. At the battery bay, note the two plastic latches that hold the top case to the bottom 
case. 
8. Use a black stick to release both latches. 
						

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 Top Case 9. Use a black stick running along the front edge of the top case to loosen—but not 
remove—the top case from the bottom case. 
10. In the keyboard well, pull up the looped end of the trackpad cable to disconnect it. 
						

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 Top Case11. Raise the top case up slightly from the bottom case until you can access the cables 
that are connected under the top case.
12.Important: Do not forcefully remove the top case.
With the cables still connected, carefully move the top case aside to disconnect the 
microphone cable and power cable.
13. Remove the top case from the computer. 
						

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 Top Case 14. The top case includes the following:
• Microphone cable
• Trackpad and trackpad cable
• Power button and cable
• Tape
• Welded EMI strips
• Magnet in keyboard well
• Foam spacers 
						

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 Top Case15. Before installing a replacement top case, check the cable routing of the 
• Power button cable
• Microphone cable
• Trackpad cable
Make sure the cables are routed correctly and cannot be pinched when installing the 
top case.
16. Install the replacement top case, and reassemble and test the computer. 
						

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 Hall Effect Sensor Board and Cable
Hall Effect Sensor Board and 
Cable
Tools
This procedure requires the following tools:
• Phillips #0 screwdriver
• Black stick (or other nonconductive nylon or plastic flat-blade tool)
Part Location
Preliminary Steps
Before you begin, remove the following:
• Battery
• Memory door and memory card 
• Keyboard
• Top case 
						

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 Hall Effect Sensor Board and Cable
Procedure
1. Remove the screw from the hall effect sensor board. 
Warning:
 When replacing the board, make sure you use the same screw. A longer 
screw could scratch the optical media.
2. Tilt up the board, and free the cable from the cable routing guides along the lower 
edge of the optical drive.
3. Lift up the tape, if provided, from the corner of the optical drive.
4. Disconnect the 3-pin connector from CN4 at the DC-to-DC board. 
5. Install the replacement board, and reassemble and test the computer. 
						

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 Hall Effect Sensor Board and Cable Replacement Note:
 Make sure the cable is routed correctly in the cable guides 
along the lower edge of the optical drive. 
						

							PowerBook G4 (12-inch 1.33 GHz) Take Apart - 37
 Hard Drive
Hard Drive
Tools
This procedure requires the following tools:
• #0 Phillips screwdriver 
• Black stick (or other nonconductive nylon or plastic flat-blade tool)
Note: To organize the screws you remove from the computer, use a tray with divided 
compartments (such as a plastic ice cube tray).
Part Location
Preliminary Steps
Before you begin, remove the following:
• Battery
• Memory door and memory card 
						

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 Hard Drive • Keyboard
• Top case
Procedure
1. Disconnect the hard drive flex cable.
2. Remove two screws from the hard drive bracket.