Apple powerbook g4 12 inch 1 5ghz User Manual

							 
PowerBook G4 (12 1.5 GHz) Troubleshooting - 
 
5
 
Bluetooth Symptom Charts
 
Bluetooth
 
Bluetooth not recognized when ADC monitor connected
 
1. Disconnect all devices except the monitor.
2. Restart the computer.
3. If Bluetooth is still not recognized, refer to Bluetooth topic articles in the Knowledge Base for the latest information on optimizing Bluetooth performance. 
						

							 
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PowerBook G4 (12 1.5 GHz) TroubleshootingError Beeps Symptom Charts
 
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-2100 compliant, SO-DIMM memory card. Refer to the Memory Replacement 
instructions for removal and installation.
 
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 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 article: 58442: Power On Self-Test Beep Definition - Part 2 
						

							 
PowerBook G4 (12 1.5 GHz) Troubleshooting - 
 
7
 
Hard Drive Symptom Charts
 
Hard Drive
 
Hard drive will not initialize
 
1. Boot from Software and Restore DVD. Under the File menu, select Disk Utility, and see if the hard drive appears on the list.
2. If no hard drive is found in Disk Utility, verify the hard drive cable connections.
3. Replace hard drive cable.
4. 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 imp\
ortant 
information.
5. 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 Software and Restore DVD.
5. Verify Disk Utility does not recognize the hard drive.
6. Verify cable connections.
7. 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).
 
8. Replace hard drive cable.
9. 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. 
						

							 
8 - 
 
PowerBook G4 (12 1.5 GHz) TroubleshootingKeyboard Symptom Charts
 
Keyboard
 
No response from any key on keyboard
 
1. Remove any connected peripherals.
2. Boot from Software and Restore DVD to verify that it is not a software problem.
3. Turn off the computer. Disconnect the keyboard connector and inspect connectors.
4. Replace keyboard.
5. Replace logic board.
 
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. 
						

							 
PowerBook G4 (12 1.5 GHz) Troubleshooting - 
 
9
 
Modem Symptom Charts
 
Modem
 
No modem dial tone
 
1. Check that the correct modem is selected in the Network Preferences pane. In Modem tab, check that sound is not turned off.
2. It is possible that the modem is connecting but not generating a sound. Check Internet  Connect to verify status.
3. Verify known-good analog (not digital) telephone line.
4. Verify known-good RJ11 telephone cable.
5. Verify RJ11 cable is not plugged into Ethernet port.
6. Inspect RJ11 connector and modem port for pin damage. 
7. Verify RJ11 telephone cable is  firmly installed in the modem port.
8. To verify system function, in Modem tab, deselect “Wait for Dial Tone Before Dialing.”
9. Verify modem 2-pin connector is plugged into modem correctly.
10. Replace the RJ11 modem cable and port. 
11. 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.
 
Cannot receive fax
 
Check that Receive faxes on this computer is selected in the Print & Fax area of System 
Preferences.
Related articles:25731: Mac OS X 10.3: Receiving faxes and connecting to the Internet
25596: Mac OS X 10.3: About Receiving Faxes.
 
Modem drops connection
 
1. Try known-good phone line.
2. Refer to Knowledge Base article 106748: Mac OS X: Troubleshooting a dial-up/PPP Internet connection. 
						

							 
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PowerBook G4 (12 1.5 GHz) TroubleshootingOptical Drive Symptom Charts
 
Optical Drive
 
The optical drive does not accept CD or DVD disc (mechanical failure)
 
1. Verify disc is not warped.
2. Verify disc is correct size. The computer will accept only 120 mm round disc. Refer to 
article 58641: Macintosh: Using Nonstandard Discs in CD-ROM or DVD-ROM Drives.
3. Replace optical drive.
 
The disc icon does not show up on the desktop, or a dialog box appears to 
initialize disc
 
1. Verify the correct type of disc is being used.
2. Try cleaning the disc. It may not mount if dirty or scratched.
3. Try a different disc. 
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. Reseat optical drive cable.
6. Replace optical drive cable. 
7. Replace optical drive.
 
The optical drive does not eject CD or DVD disc
 
1. Verify disc is not in use by quitting any applications that may be using the disc.
2. Press and hold Media Eject key at top right corner of keyboard. If that does not work,  hold down Function (fn) key and Media Eject key.
3. Drag disc icon to trash or select it and press Command-E.
4. Choose Restart from Apple menu while holding down trackpad button.
5. Refer to Take Apart to remove the stuck disc and replace the optical drive. Related article:
106752: Macintosh: How to Eject a Disc When Other Options Do Not Work 
						

							 
PowerBook G4 (12 1.5 GHz) Troubleshooting - 
 
11
 
Ports Symptom Charts
 
Ports
 
FireWire or USB port not recognizing devices; or device not recognized by 
computer
 
Note:
 
 If you are trying to use a serial device with a USB/Serial adapter, check with the 
manufacturer of the adapter for compatibility.
1. Completely shut down, then press the power button to start the computer.
2. Use Software Update in Mac OS X system preferences to verify that the latest  software is installed.
3. Use Apple System Pro filer to verify that the computer is recognizing the device.
4. For USB, test ports with a known-good Apple keyboard or mouse. Try different USB  device on same port.
5. For FireWire, test by connecting another computer in FireWire Target Disk Mode.  Refer to article 58583: How to Use FireWire Target Disk Mode.
6. If a camera, turn on the camera before opening the video application.
7. Verify current driver for the device is installed. Verify that drivers are installed properly  for third party, if needed.
8. 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.)
9. Try other port if available.
10. Try a different cable. (Cable noise could be a problem.)
11. Try known-good device.
12. Eliminate chain by plugging in only one peripheral.
13. If self powered make sure that the power supply is connected and devices LED  indicates that it is getting power.
14. Reset the power manager by pressing 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).
 
15. Replace logic board. 
						

							 
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PowerBook G4 (12 1.5 GHz) TroubleshootingSound Symptom Charts
 
Sound
 
Distorted sound from speakers
 
1. Verify sound is correct with external speakers/headphones. If sound is correct, replace 
top case.
2. Verify speaker cables are inserted correctly, and check cables for damage.
3. Check balance in System Preferences: Sound: Output.
4. Replace rear panel assembly with attached speakers. 
5. Replace subwoofer. 
6. Replace logic board.
 
No sound from speaker(s)
 
1. Use the Software Update preference pane to verify that the latest software updates  have been installed.
2. Press the F3 key to verify that mute mode is not enabled.
3. Press the F4 or F5 key to check the volume setting.
4. Verify no external speakers or headphones are plugged in.
5. In the Sound preference pane con firm that only one device is listed in the Output tab.
6. Shut down computer and restart.
7. 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).
8. Verify that the speaker cable is connected properly to logic board.
9. Replace top case.
10. Replace logic board. 
						

							 
PowerBook G4 (12 1.5 GHz) Troubleshooting - 
 
13
 
Startup Symptom Charts
 
Startup
 
The computer will not power on
 
1. Make sure that power adapter connector is fully inserted.
2. Remove any connected peripherals.
3. Try known-good power outlet.
4. Try known-good power adapter and power cord.
5. Remove battery.
6. Press Caps Lock key to see if light on key comes on. If it does, hold power button down for six seconds to shut down the computer and restart.
7. 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).
 
8. 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).
9. Remove any additional RAM 
10. Remove AirPort Card.
11. Try known-good DC board.
12. Verify cable connections and check cables for damage.
13. Verify power button is connected properly to logic board, if power button is not  functioning correctly or damaged, replace the top case.
14. Replace logic board.
 
The computer freezes during startup or a  flashing question mark appears
 
1. If using Classic in Mac OS X, check for incompatible extensions:
• Turn off system extensions in Classic by opening System Preferences, cli\
cking Classic, clicking the Advanced tab, and choosing Turn Off Extensions. Cl\
ick 
Restart Classic.
• If turning off extensions appears to solve the problem, identify and eli\
minate or  reinstall the extension that is causing the problem. Open the Extensions\
 Manager 
control panel, and turn off the extensions that you suspect are causing \
the 
problem. Restart Classic with the extensions turned on again.
2. From the Software Install and Restore disc, use Disc Utility.  
						

							 
14 - 
 
PowerBook G4 (12 1.5 GHz) TroubleshootingStartup Symptom Charts
3. Reinstall the computer’s system software.
 
The computer shuts down or sleeps unexpectedly 
 
1. Calibrate the battery.
Refer to Knowledge Base article 86284: Calibrating your computers batte\
ry for best 
performance
2. Test the battery under a normal workload. If the battery lasts less than two hours, it is  considered to have severely degraded performance.
•  If the battery was purchased (either with the computer or as a standal\
one part) in the last 90 days and exhibits severely degraded performance (as defined\
 above) 
provide an in-warranty replacement. 
• If the battery was purchased between last 90-365 days, have the customer\
  calibrate their battery. If after recalibration the battery still exhibi\
ts severely 
degraded performance, then provide an in-warranty replacement. 
•  If the battery was purchased more than 365 days ago, the customer needs\
 to  purchase a new battery.