Apple powerbook g4 12 inch 1 5ghz User Manual

 
PowerBook G4 (12 1.5 GHz) Troubleshooting - 
 
15
 
Display 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...

 
16 - 
 
PowerBook G4 (12 1.5 GHz) TroubleshootingDisplay Symptom Charts
transistors on an LCD. Therefore, a certain number of subpixel anomalies is considered 
acceptable. Rejecting all but perfect LCD panels would signi
ficantly increase the retail 
price for products using LCD displays. These factors apply to all manufacturers using LCD 
technology—not just Apple products.
To determine whether or not the display has an acceptable number of pixel anomalies, 
follow the steps below:
1. Set the display...

 
PowerBook G4 (12 1.5 GHz) Troubleshooting - 
 
17
 
Video (S-Video and Composite adapter) Symptom 
 
Video (S-Video and Composite adapter)
 
No video on an external device
 
1. Make sure you are using the S-Video and Composite adapter cable.
2. Verify TV or VCR is set up properly with correct source.
3. Try different TV or VCR. Check owner’s manual for TV or VCR.
4. Replace adapter cable.
5. Replace logic board. 
 
The display is rolling (PAL instead of NTSC)
 
1. Make sure you are not using Apples A/V...

 
18 - 
 
PowerBook G4 (12 1.5 GHz) TroubleshootingTrackpad Symptom Charts
 
Trackpad
 
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. 
3.
 
If the pointer moves as you type because you accidentally brush the trac\
kpad, 
select Ignore accidental...

 
PowerBook G4 (12 1.5 GHz) Troubleshooting - 
 
19
 
Trackpad Symptom Charts
 
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).
 
4. 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).
5. Remove and reseat memory...

20 - PowerBook G4 (12 1.5 GHz) Troubleshooting
Sudden Motion Sensor (SMS) Symptom Charts
Sudden Motion Sensor (SMS)
System Profiler shows Sudden Motion Sensor is “disabled.”
Note: In some locations you may see the Sudden Motion Sensor referred to as the Mobile 
Motion Module. Both names refer to the same feature.
1. Put the computer to sleep. Pick up the computer, and set it on a steady table top.  Wake up the computer, and refresh System Pro filer window under View menu (or use 
command-R). 
• If the...

PowerBook G4 (12 1.5 GHz) Troubleshooting - 21
Sudden Motion Sensor (SMS) Symptom Charts disables the sensor).
5. Type your administrator password when you are prompted and press Return.
6. Type the pmset -g # command again to be sure that the setting has been ap\
plied.
Any changes that you make to the Sudden Motion Sensor setting remains in effect even 
after you restart the computer. If you choose to disable the Sudden Motion Sensor, Apple 
recommends that you re-enable it as soon as possible in order...

22 - PowerBook G4 (12 1.5 GHz) Troubleshooting
Misc. Symptoms 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 1.5 GHz) Troubleshooting - 23
Misc. Symptoms Symptom Charts 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...

24 - PowerBook G4 (12 1.5 GHz) Troubleshooting
Misc. Symptoms Block Diagram
Block Diagram
PCI bus
I2S
I2S
12 Mbps USB
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
controllerPMU99
power controller
Trackpad
Keyboard
Power supply and charger
Optical drive
256MB SO-DIMM expandable up to 1.25 GB
Ultra
ATA bus
EIDEbus
Audio line out
Hard...