Apple ibook g4 User Manual

							iBook G4 Take Apart - 50
 Top Case
Preliminary Steps
Before you begin, remove the following:
• Battery 
• Keyboard and RAM shield
• AirPort Extreme Card
• Memory card
• Bottom case
• Bottom shield
• DC-in board
Procedure
1. With the computer upside down on a soft cloth, remove the two screws from the 
battery bay. 
						

							51 - iBook G4 Take Apart
 Top Case 2. Turn over the computer. 
3. Remove the three identical screws from the keyboard well near the slot load drive 
opening.
4. Remove the remaining screws in the keyboard well:
• Using a small flat-blade screwdriver, pry up the magnet. Then remove the 4.5-mm 
long screw beneath it.
• 6-mm long screw with large screw head at upper left corner of keyboard well
• 6-mm long screw at lower left corner of keyboard well
• 6-mm long screw with large screw head near keyboard cable connector
Note: When reassembling the computer, be sure to install the magnet over the 
screw. 
Replacement Note: When reinstalling the top case screws, install them in the order 
shown. 
						

							iBook G4 Take Apart - 52
 Top Case5. Peel up the cosmetic tape that runs the length of the speaker wire, but make sure that 
the speaker wire beneath it remains in place. Set aside the speaker wire tape.
Note: When reassembling the computer, reuse the speaker wire tape, but make sure 
the speaker wire is lying flat on the top shield, as shown, before applying the tape. 
Note: When reassembling the computer, ensure that the shrink tubing section of the 
speaker cable sticks to the top shield and is routed as shown.  
						

							53 - iBook G4 Take Apart
 Top Case 6. Use a soft cloth to protect the computer.
7. Using a black stick, begin to carefully separate the top case from the computer 
assembly.
Reposition the computer as you work around the top case to open up the seam that 
joins the top case and bottom case.
8. While continuing to loosen the top case, use caution around the battery bay. If 
necessary, flex the inner frame to release that corner of the top case. 
						

							iBook G4 Take Apart - 54
 Top Case9. As you begin to loosen the top case, check that the trackpad cable (orange flex cable) 
has disconnected from the top case. Or use a black stick to disconnect it.
Replacement Note: When the top case is removed, the trackpad cable automatically 
disconnects from the logic board. However, when installing the top case, use a black 
stick to press down on the connector, and make sure the trackpad cable connects 
securely to the four pins on the logic board. 
						

							55 - iBook G4 Take Apart
 Top Case 10. Place the computer on its side, and with most of the top case loosened, tilt the top 
case away from the computer latch.
Warning: The top case is connected to the computer assembly with delicate 
cables. Do not remove the top case until the cables are disconnected (see the 
next steps). 
Warning: When performing this step, make sure the speaker cable and shorter 
power switch cable are not strained. 
11. With the top case loosened, tilt the top case away from the computer assembly so you 
can see the shorter power switch cable and the longer speaker cable. Do not 
disconnect them yet. 
						

							 
iBook G4 Take Apart -   
56  
 Top Case12. Place the computer upright, and move the top case off center. Use a black stick to 
carefully disconnect the two cables from the logic board. 
						

							 
57 -  
iBook G4 Take Apart
 Top Case   Replacement Note:
  When connecting the speaker cable, make sure the wires are 
routed under the top shield as shown.
13. Remove the top case from the computer. 
						

							 
iBook G4 Take Apart -   
58  
 Top Case14. Before installing the replacement top case, make sure it includes the following: 
• Speaker set
• Power button and board (under left speaker)
• Speaker cable and power switch cable
• Trackpad assembly with board and cable
• Display latch
• Sleep magnet (on palm rest below left speaker)
–
  Replacement Note:
  The sleep magnet can pop off during the top case removal. 
Make sure the sleep magnet is in place when replacing the top case.  
  Important:
   Make sure you transfer the original serial number label and Ethernet label 
from the old top case to the replacement top case. You can use a black stick to 
carefully peel up a corner of the label. Then peel off the label completely and apply it 
to the replacement top case. Make sure that the labels lie completely flat so they do 
not interfere with the battery compartment.  
						

							 
59 -  
iBook G4 Take Apart
 Top Case 15. Before installing the top case, make sure a foam pad is positioned correctly on the 
metallic surface by the trackpad board. 
If the foam pad is missing, order a trackpad kit (Apple part number 076-1078), and 
apply one of the adhesive foam pads.