Apple powerbook g4 12 inch User Manual

 

PowerBook G4 (12-inch) Troubleshooting - 
 
9
 
 Symptom Charts
 
Display
 
No display, or dim display, but computer appears to operate correctly
 
1. Press F2 to increase the screen brightness setting.
2. Remove any connected devices. Allow the battery to charge to at least 10 percent before plugging in external devices.
3. Try known-good power outlet, power adapter and power cord.
4. Reboot the computer—hold down the Control and Command keys and press the  Power button, or press and hold the Power...

 

10 - 
 
PowerBook G4 (12-inch) Troubleshooting Symptom Charts
count each subpixel anomaly:
• Bright subpixel anomaly = subpixel that is always on
• Dark subpixel anomaly = subpixel that is always off
3.
 
Important:
 
 Check the number of subpixel anomalies with the following chart:
4. If the number of subpixel anomalies exceeds the acceptable number listed in the  chart, replace the LCD panel.
5. If the number of subpixel anomalies is acceptable, explain to the customer that the  pixel anomalies are...

 

PowerBook G4 (12-inch) Troubleshooting - 
 
11
 
 Symptom Charts
 
Display shows ghosting (signal reflection) 
 
1. Verify that cables are correctly installed and  firmly seated.
2. Replace video adapter.
 
Video (RGB adapter)
 
No video on an external device
 
1. Make sure RGB adapter cable is fully seated.
2. Click Detect Displays button to verify that monitor is being recognized in the Displays  preference pane, and is known-good and supported by this computer.
3. Try known-good RGB adapter.
4....

 

12 - 
 
PowerBook G4 (12-inch) Troubleshooting Symptom Charts
 
Misc. Symptoms
 
The computer runs with battery, but not with the power adapter plugged into 
wall outlet
 
1. Try known-good power outlet. 
2. Try known-good power adapter and power cord. 
 
Note:
 
 Verify that power adapter connector glows amber or green. If the power \
adapter light is green, turn over the computer and press the battery but\
ton. One to 
five lights glow to show the battery’s level of charge. One blinking \
light...

 

PowerBook G4 (12-inch) Troubleshooting - 
 
13
 
 Symptom Charts
 
The cursor does not move when you are using trackpad
 
1. Verify that no USB device is connected.
2. Boot from a Mac OS system CD to verify that it is not a software problem.
3. 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.
 
4. Check trackpad cable and connection to the logic board (see separate Keyboard and...

 

14 - 
 
PowerBook G4 (12-inch) Troubleshooting Symptom Charts
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....

 

PowerBook G4 (12-inch) Troubleshooting - 
 
15
 
 Symptom Charts
 
Block Diagram: PowerBook G4 (12-inch DVI) 

 

© 2002 Apple Computer, Inc. All rights reserved.
 

 
 
 
Service SourceViews
 
PowerBook G4 (12-inch)
PowerBook G4 (12-inch DVI) 

 PowerBook G4 (12-inch) Views - 
 
1
 
  
Main Exploded View: PowerBook G4 (12-inch) 
Keyboard Kit
076-0982
Top Case
922-5652
Hard Drive Cable
922-5740
Modem
661-2632
Heatsink with Fan
922-5654
RJ11 Modem Board
922-5731
I/O Ports Shield
922-5820
Reed Switch Board
922-5656
Inner Frame
922-5657
DC-to-DC Board 922-5890
Top Bracket
922-5734
Shoulder Bracket
922-5745
Optical Drive Bezel
922-5819
Bottom Bracket
922-5733
Rear Panel with Speakers
922-5724
Bluetooth
922-5764
Subwoofer
922-5818
Not Shown,...

 2 -   
PowerBook G4 (12-inch) Views 
Display Exploded View: PowerBook G4 (12-inch) 
Antenna Cable
Assembly
922-5721
Right Hinge
with Bezel Brace 922-5711 Display Housing
922-5718
LVDS Cables
922-5720
Inverter Board
922-5719
Right Clutch Cap
922-5717
Clutch Cover
922-5715
LCD Panel
661-2791
Left Hinge
with Bezel Brace 922-5712
Display Bezel 922-5710
Left Clutch Cap 922-5716