Apple powerbook g4 12 inch 1 33ghz User Manual

							
 

PowerBook G4 (12-inch 1.33 GHz) Troubleshooting
 Symptom Charts 8. Check trackpad cable and connection to the logic board (see separate Keyboard and 
Top Case replacement instructions for location under top case).
9. Replace top case.
10. Reseat the heatsink if it is not properly secured.
11. Replace logic board.
 
The microphone is not working
 
1. In the Sound preference pane select the Input tab. Make sure that the internal  microphone device is selected in the list.
2. In the Sound preference pane select the Input tab. Make sure that the input volume is  midrange or above.
3. In the Sound preference pane select the Output tab. Make sure the built-in audio  controller is selected.
4. Create new Mac OS X user and log in as that user. (So that the customer does not  question the new user, remove the user once disc is veri fied.)
5. Reset PRAM (Press the power button, then hold down the Option-Command-P-R  keys until you hear the startup chime at least one additional time after the initial 
startup chime).
6. Verify microphone cable connection to logic board.
7. Replace top case (which includes the microphone).
8. Replace logic board.
 
The latching mechanism that holds the display closed is not working
 
Note: 
 
As the display closes against the top case, a hook in the top of the display housing 
should be magnetically pulled down into a slot in the top case, and secured. When the 
latch button is pushed, the hook should release and retract into the display housing, 
allowing the display to open.
1. Verify hook operation by exercising the latch mechanism. 
2. If the hook does not operate properly, replace the display bezel.
3. If the latch or latch button does not operate properly, replace the bottom case  assembly.
 
Fan fails
 
1. Check fan cable connection, and check cable for damage.
2. Replace fan.
3. Replace logic board. 
						

							
 

16 - 
 
PowerBook G4 (12-inch 1.33 GHz) Trouble- Symptom Charts
 
Trackpad works intermittently
 
The trackpad operation can be affected by hand lotion, humidity, dangling jewelry, and the 
use of more than one finger on the trackpad. 
1. Check for environmental factors such as humidity, hand lotion, or jewelry.
2. Clean the trackpad with a clean, dry lint-free cloth. 
Related articles: 17228: Portables: Jumpy or Erratic Trackpad Operation
58389: PowerBook and iBook: Trackpad Does Not Respond 
						

							
 

PowerBook G4 (12-inch 1.33 GHz) Troubleshooting
 Symptom Charts
 
Block Diagram: PowerBook G4 (12-inch 1.33 GHz)
PCI bus
I 2S
I
2S
12 Mbps USB
Mini-DVI
connector
Ethernet port FireWire 400 port
Built-in
speakers
Mid-range
enhance Audio line in
Internal
microphone
AGP4X
bus
167 MHz
Memory bus 167 MHz
MaxBus
Intrepid
memory
controller and I/Odevice
controller
PMU99
power controller
Trackpad
Keyboard
Power supply and charger
Optical drive
up to 1.25 GBDDR SDRAM
Ultra
ATA bus
EIDEbus
Audio line out
Hard disk drive
NVIDIA
GeForce FX Go5200
graphics IC
Flat-panel display
Audio
codec
Ethernet PHY
FireWirePHY
PowerPC G4
microprocessor
(L2 cache: 512K 1:1)
256 MB SDRAM
DDR on-board
Modem port
Modem module
Bluetooth
Boot
ROM
USB 2.0 port
USB 2.0 port
PCI USB
controller
Data pump and DAA
AirPort Extreme 
						

							
 

© 2004 Apple Computer, Inc. All rights reserved.
 

 
 
 
Service SourceViews
 
PowerBook G4 (12-inch 1.33 GHz) 
						

							
 

PowerBook G4 (12-inch 1.33 GHz) Views - 
 
1
 
 
 
Main Exploded View 
Keyboard Kit
076-0982
Top Case
922-6380
Optical Drive Bracket, Top
922-6414
Hall Effect Sensor
Board with Cable
922-6483
922-6239
Optical Drive
Combo 661-3255
SuperDrive 661-3253 Bezel,
Optical Drive
922-5819
Optical Drive 
Bracket, Bottom
922-6244
Flex Cable, Optical Drive
922-6240
Bracket, Hard Drive
922-5736
Holder, Hard Drive, Left 922-5737
Hard Drive
60 GB 661-3247
80 GB 661-3243
Cushion, Hard Drive 922-5739
Flex Cable, Hard Drive 922-5740 Holder, Hard Drive, Right
922-5738
Shield, Battery Connector 922-6416
DC-to-DC Board 922-6422
Guide Rail, AirPort 922-5744
Internal Frame 922-6385 Fan with Cable
922-6242
Modem Shield
922-6384
Soft Modem Card
922-6492 Heatsink
922-6383
Logic Board
661-3232
Bluetooth Cable
922-6494
Rear Panel with Speakers
922-6387
Subwoofer
922-6412
Bottom Case
922-6386
Battery Retention Bar
922-6573
Battery, 46W
661-3233
I/O Shield, Top
922-6078
I/O Shield, Port Side 922-6080
RJ11 Modem Board and Cable 922-6381
DC-In Board 922-5655
SDRAM Card
 256 MB 661-3323
512 MB 661-3324 1 GB 661-3325
RAM Door922-6415 Bluetooth Board
922-6571
922-5764 (Q6T)
Sleep LED Board 922-5659
EMI Shield, DC-In
922-5728
Sleeve, DC Port, Pkg. of 5 922-5743
RJ11 Shield
922-6417 
						

							
 

2 - 
 
PowerBook G4 (12-inch 1.33 GHz) Views
 
Display Exploded View
Rear Display Housing
922-6243
Inverter Board
922-6421 LCD Panel
661-2791LVDS Cable
922-5720
Left Hinge
922-5712
922-5714 (SS)
Right Hinge
922-5711
922-5713 (SS)
Front Display Bezel
922-6077
Clutch Cover
922-5715
Right Clutch Cap
922-5717
Left Clutch Cap
922-5716
Antenna Cable Assembly
922-6074