Apple ibook g4 early 2004 User Manual

							 
iBook G4 Take Apart -   
170  
 Microphone Cable5.
  Warning:
   
  When removing the tape and spiral tube that bundles the microphone 
cable to the LCD cable, be careful not to strain or pinch the cables.
Replacement Note:
   When installing the replacement microphone cable, reuse the 
spiral tube to bundle the microphone cable to the LCD cable. However, use new tape 
when bundling the cables together. 
Separate the microphone cable from the LCD cable by removing the tape, and 
uncurling the spiral tube. 
6. Remove the microphone cable from the assembly.
7. Install the replacement microphone cable, and reassemble and test the computer. 
						

							 
171 -  
iBook G4 Take Apart
 Bezel Brace with Clutch Assembly  Bezel Brace with Clutch 
Assembly 
Tools 
• Soft cloth
• #0 Phillips screwdriver 
Replacement Note: 
 If the tape you remove from this assembly is worn and cannot be 
reused, use new Kapton tape (Apple part number 922-5025). 
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
• Top case
• Top shield
• Modem
• Display module
• LCD panel
• Display clutch cover
• Inverter board
• Antenna board
• Reed switch board
• Microphone cable 
						

							 
iBook G4 Take Apart -   
172  
 Bezel Brace with Clutch Assembly  Procedure  1. With the bezel assembly lying on a soft cloth, remove the three pieces of tape. 
2. Remove the two 5- mm long Phillips screws at the left bezel brace. 
3. At the right bezel brace, remove the two Phillips screws:
• one 5-mm long screw near the top of the right brace
• one 3-mm long screw near the middle of the right brace
 
Replacement Note: 
 When installing the replacement bezel brace with clutch 
assembly, make sure the shorter 3-mm long screw is installed in the middle of the 
right bezel brace, as shown.
4. Remove the two 5- mm long Phillips screws at the bottom bezel brace. 
						

							 
173 -  
iBook G4 Take Apart
 Bezel Brace with Clutch Assembly 5. Lift the 3-sided bezel brace with clutch assembly off of the bezel.   
6. Install the replacement bezel brace with clutch assembly, and reassemble and test the 
computer. 
						

							 
© 2004 Apple Computer, Inc. All rights reserved.
 

 
 
 
Service Source
Troubleshooting
 
iBook G4 (12-inch Late 2004) 
						

							 
iBook G4 (12-inch Late 2004) Troubleshooting - 
 
1
 
 Symptom Charts
 
Symptom Charts
 
How to Use the Symptom Charts
 
The Symptom Charts included in this chapter will help you diagnose specific symptoms 
related to the product. Because cures are listed on the charts in the order of most likely 
solution, try the cures in the order presented. Verify whether or not the product continues 
to exhibit the symptom. If the symptom persists, try the next cure. 
 
Note:
 
  If you have replaced a module, reinstall the original module before you proceed to 
the next cure.
 
AirPort Extreme Card
 
AirPort Extreme Card not recognized
 
1. Use Software Update in Mac OS X system preferences or see the Apple Software 
Updates web page to make sure the latest version of AirPort software is installed.
2. Check Network pane in System Preferences to verify AirPort port is selected.
3. Reseat AirPort Extreme Card and make sure AirPort antenna cable is fully connected. 
4. Remove and reinstall the AirPort software.
5. Replace with known-good AirPort Extreme Card. 
6. Replace logic board.
 
AirPort Extreme Card installed and received a -3278 error
 
1. Check to make sure using the latest version of AirPort software.
2. Reseat AirPort Extreme Card.
3. Remove and reinstall the AirPort software.
4. Replace with known-good AirPort Extreme Card.
5. Replace logic board. 
						

							 
2 - 
 
iBook G4 (12-inch Late 2004) Troubleshooting
 Symptom Charts
 
Poor AirPort  reception
 
1. Refer to Knowledge Base article 88258: PowerBook G4: How to Optimize AirPort 
reception.
2. Reseat AirPort antenna and cable.
3. Check AirPort antenna cable for damage.
4. Replace with known-good AirPort Extreme Card.
5. Replace AirPort antenna board and cable.
 
Battery
 
The battery wont charge
 
1. Remove any connected peripherals.
2. Try known-good power outlet.
3. Try known-good power adapter and power cord.
4. Try known-good battery.
5. Reset the power manager by pressing the key combination Control-Option-Shift-
power. 
 
Warning: Make sure you do not hold down the fn key when resetting the 
power manager.
Warning: Resetting the power manager means you will also need to reset the 
date and time (using the Date & Time control panel).
 
6. Replace logic board.
 
Short battery life
 
Refer to Knowledge Base article 114154: SOP: Battery Screening Process--Worldwide.
 
Error Beeps
 
The computer automatically performs a power-on self test when it is turned on after being 
fully shut down (not a restart). This section describes what to do if beeps are heard during 
the startup.
 
Note:
 
 The computer has a memory expansion slot that accepts a 1.25-inch (or shorter) 
PC-100 compliant, SO-DIMM memory card. Refer to the Memory Replacement 
instructions for removal and installation. 
						

							 
iBook G4 (12-inch Late 2004) Troubleshooting - 
 
3
 
 Symptom Charts
 
Computer beeps once at startup
 
1. One beep means that no RAM is detected.
2. If a RAM card is installed in the expansion slot, remove it and put in known-good and 
compatible RAM and restart. 
• If symptom does NOT repeat, replace RAM card. 
• If symptom repeats, replace logic board.
3. If no RAM card is installed, replace logic board.
 
Computer beeps twice at startup
 
1. Two beeps means that EDO memory is installed in the expansion slot. The iBook 
computer does not accept EDO memory.
2. Replace RAM card with known-good and compatible RAM and restart. 
• If symptom repeats, replace logic board.
 
Computer beeps three times at startup
 
1. Three beeps means that no RAM banks passed memory testing.
2. If a RAM card is installed in the expansion slot, remove it and put in known-good and 
compatible RAM and restart. 
• If symptom does NOT repeat, replace RAM card. 
• If symptom repeats, replace logic board.
3. If no RAM card is installed, replace logic board.
 
Computer beeps four times at startup
 
1. Four beeps indicates a bad checksum for the remainder of the boot ROM. The ROM 
(which is located on the logic board) is bad.
2. If a RAM card is installed in the expansion slot, remove it and put in known-good and 
compatible RAM and restart. 
• If symptom does NOT repeat, replace RAM card. 
• If symptom repeats, replace logic board.
3. If no RAM card is installed, replace logic board.
Related articles:
58442: Power On Self-Test Beep Definition - Part 2
111772: iBook (Dual USB): Beeps Are Heard at Startup (one to four beeps) 
						

							 
4 - 
 
iBook G4 (12-inch Late 2004) Troubleshooting
 Symptom Charts
 
Hard Drive
 
Hard drive will not initialize
 
1. Boot from iBook Software Install CD and see if the hard drive mounts on the desktop.
2. Boot from the Mac OS X software install CD. Under the File menu, select Disk Utilities 
and initialize the disk or run Disk First Aid.
3. If no hard drive is found in Drive Setup, verify the hard drive cable connections.
4. Replace hard drive cable.
5. Replace hard drive.
 
Important:
 
 If the computer is under warranty and data recovery is required, refer to 
Article 31077: Hard Drive Data Recovery & Warranty Implications, for important 
information.
6. Replace logic board.
 
The internal hard drive does not spin
 
1. Disconnect any connected peripherals.
2. Try known-good power outlet.
3. Try known-good power adapter and power cord.
4. Boot from a Mac OS system CD.
5. Verify Drive Setup does not recognize the hard drive.
6. Verify cable connections.
7. Replace hard drive cable.
8. Replace hard drive.
 
Noisy hard drive
 
Some sounds such as ticking or a rotational noise are normal. Refer to Knowledge Base 
article 30593: PowerBook: Hard Drives and Noise.
 
Keyboard
 
No response from any key on keyboard
 
1. Remove any connected peripherals.
2. Boot from a Mac OS system CD to verify that it is not a software problem.
3. Turn off the computer. Disconnect the keyboard connector and inspect connectors. 
						

							 
iBook G4 (12-inch Late 2004) Troubleshooting - 
 
5
 
 Symptom Charts4. Replace keyboard.
5. Replace logic board.
 
The keyboard lock is damaged or wont lock
 
1. Verify that keyboard is installed properly so the lock lines up with the notch in the top 
case.
2. Replace keyboard.
 
Keycap pops off
 
1. If the keycap is not broken, it can probably be reinstalled. To replace the keycap, refer 
to Knowledge Base article 88106: PowerBook G4: Keycap Replacement.
2. Replace keyboard.
 
Modem
 
No modem dial tone
 
1. Check that the correct modem is selected. In Mac OS X, check Network Setup.
2. Verify known-good analog (not digital) telephone line.
3. Verify known-good RJ11 telephone cable.
4. Verify RJ11 cable is not plugged into Ethernet port.
5. Inspect RJ11 connector and modem port for pin damage. 
6. Verify RJ11 telephone cable is firmly installed in the modem port.
7. If using Apple Remote Access, select Ignore Dial Tone in the Modem control panel. If 
the modem connects with this settings selected, try another phone line. If using a 
terminal or communications program, enter atx1 to disable tone detection. To reset the 
modem back to the factory settings, enter atz.
8. Verify modem 2-pin connector is plugged into modem correctly.
9. Replace the modem 2-pin connector cable. 
10. Replace modem.
Related article:
106592: Mac OS X: How to Use Modem AT Commands
 
Cannot send fax
 
1. Check that Network connection in System Preferences is set to Internal Modem.
2. Refer to Knowledge Base article 25746: Mac OS X 10.3: Fax doesnt send.