Apple PowerBook G4 (DVI 667 and 800MHz) 02 Service Manual

Take Apart

PowerBook G4 (DVI)- 667, 800 MHz

AppleCare

Updated : 04-06-2002

 Service Source

Troubleshooting

PowerBook G4 (DVI)

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.

The steps to solve a symptom are listed sequentially. You might not need to perform every step before the symptom is solved. Start with the first step, and then test for the symptom. If the symptom persists, replace any modules you removed, go to the next step, and test again. Continue down the list until the symptom is solved.

Related articles can be found in the Knowledge Base at: http://kbase.info.apple.com/

Startup

The computer will not power on (no fan movement, hard drive spin up and display is not lit)

1. Remove any connected peripherals.

2. Check that the battery has enough charge to start the computer by pressing the button next to the LEDs on the battery. At least one LED must light solid (not ﬂashing).

3. Connect known-good PowerBook (DVI) power adapter (922-5164) and power cord, if using, to known-good power outlet; DC plug should light up. Make sure DC plug is ﬁrmly inserted.

Important:

(DVI) computers. To identify these adapters, check that the last three characters in the serial number (located under the plug connection on the adapter) is one of the following: MKC, MKD, MDK, MKE, MKF, MKG, MKH, MKJ, MKK.

4. Try powering up without the battery installed.

5. 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.

The PowerBook (DVI) power adapter must be used with the PowerBook

Startup Symptom Charts

PowerBook G4 (DVI) Troubleshooting -

6. With a non-metallic tool, reset the power manager by pressing the reset button (located under the keyboard in the recess just left of the power button). Wait ﬁve seconds before continuing. Press the power button to start the computer.

Warning: Resetting the power manager will permanently remove a RAM disk, if present, and all of its contents. You will also need to reset the date and time (using the Date & Time control panel) .

7. Verify power button cable is connected properly to logic board, if power button is not functioning correctly or damaged, replace the top case.

8. Disconnect keyboard completely. Inspect connectors. Restart with keyboard disconnected.

9. Remove any additional RAM.

10. Remove AirPort Card.

11. Verify DC-in board cable is securely connected.

12. Try known-good DC-in board.

13. Replace logic board.

Memory error message appears on the screen

1. Reseat the DIMMs.

2. Verify proper memory is being used. The PowerBook (DVI) uses

shorter) PC-133 compliant, SO-DIMM memory cards.

3. Run Apple Hardware Test. If the test ﬁnds bad memory, replace the DIMMs one at a time and test until all bad DIMMs are replaced with known-good modules. If the failure is intermittent, run Apple Hardware Test in loop mode (Control-L) for an e xtended time to test the memory.

1.25-inch (or

Startup Symptom Charts

PowerBook G4 (DVI) Troubleshooting -

Flashing question mark appears on the screen

1. Start up from the system restore CD and check to see if the hard drive shows up on the desktop. If it does, go to step 2. If it does not, go to step 4.

2. Mac OS X: Run Disk Utility. Mac OS 9: Run Disk First Aid. Update the driver and restart the computer.

3. Reinstall system software using the system restore CD that came with the computer.

4. Reseat the hard drive ﬂex cable.

5. Replace the hard drive.

Computer begins to power up, the fan and hard drive are spinning, hitting caps lock key and LED turns on, but there is no startup chime or video

1. With a non-metallic tool, reset the power manager by pressing the reset button (located under the keyboard in the recess just left of the power button). Wait ﬁve seconds before continuing. Press the power button to start the computer.

Warning: Resetting the power manager will permanently remove a RAM disk, if present, and all of its contents. You will also need to reset the date and time (using the Date & Time control panel).

2. Replace the logic board.

System shuts down intermittently

1. Disconnect all external peripherals.

2. Make sure the battery is fully inserted and is charged.

3. Check battery connection to main logic board.

4. Make sure system is not over heating, the air vents are clear and unit is not on soft surface.

Startup Symptom Charts

PowerBook G4 (DVI) Troubleshooting -

5. Check that the fan cable is connected and the fan is operational.

6. Check that the heat exchanger is properly attached to the processor.

Important:

transfer material for the processor must be reinstalled.

7. Remove the battery and connect known-good PowerBook (DVI) power adapter (922-

5164) and power cord, if using, to known-good power outlet; DC plug should light up. Make sure DC plug is ﬁrmly inserted.

Important:

8. Verify DC-in board cable is securely connected.

9. Try known-good DC-in board.

10. Replace the logic board.

If the heat exchanger is separated from the logic board, new thermal

The PowerBook (DVI) power adapter must be used with the PowerBook

System shuts down almost immediately after startup

1. Disconnect all external peripherals.

2. Make sure the battery is fully inserted and is charged.

3. Check battery connection to main logic board.

4. Replace the logic board.

System crashes or hangs intermittently

1. If the system crashes or hangs in a speciﬁc application, replace the application. Mac OS X: Verify the application is compatible with OS X.

2. Clear parameter RAM. Hold down Command-Option-P-R during startup until you hear a second startup chime.

3. Perform a clean install of system software with the system restore CD that came with the computer.

4. Mac OS 9: Start up with extensions off to determine if there are system extension or control panel problems.

5. Mac OS X: Relaunch Finder.

6. Mac OS X: Run Disk Utility. Mac OS 9: Run Disk First Aid.

7. Run Apple Hardware Test in loop mode (Control-L) for an extended time to test the memory. If the test ﬁnds bad memory, replace the DIMMs one at a time and test until all bad DIMMs are replaced with known-good modules.

8. Replace the logic board.

Startup Symptom Charts

PowerBook G4 (DVI) Troubleshooting -

At startup, a dialog box comes up stating: “kernel panic” in Mac OS X or “Built-in memory test has detected an error” in Mac OS 9

1. If there are two RAM cards installed in the expansion slots, remove top card and restart.

• If symptom repeats, replace bottom card with known-good RAM card.

• If symptom does not repeat, replace top RAM card with known-good RAM card and restart.

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 PowerBook G4 has two memory expansion slots and accepts 1.25-inch (or shorter) PC-133 compliant, SO-DIMM memory cards; there is no RAM on the logic board itself. Refer to Memory Card Replacement instructions for removal and installation.

Computer beeps once at startup

1. One beep means that no RAM is detected.

Note:

There is no RAM on the logic board itself, so the computer will beep if no

memory is installed in at least one of the RAM slots.

2. Put the original RAM that came with the computer back in, or put in known-good and

compatible RAM and restart.

• If symptom does not repeat, replace RAM card(s).

• If symptom repeats, replace logic board.

Computer beeps twice at startup

1. Two beeps means that EDO memory is installed in the RAM expansion slot. The

PowerBook does not accept EDO memory.

2. Replace RAM card(s) 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 upper expansion slot (if not, skip to next step), remo v e

it and restart.

• If symptom does not repeat, replace RAM card.

• If symptom repeats, replace RAM in lower RAM slot with known-good and compatible RAM card and restart. If symptom repeats, replace logic board.

Error Beeps Symptom Charts

PowerBook G4 (DVI) Troubleshooting -

3. If a RAM card is not installed in the upper expansion slot, replace RAM in lower RAM slot with known-good and compatible RAM card and restart.

• If symptom repeats, 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. Replace RAM card(s) with known-good and compatible RAM and restart.

• If symptom repeats, replace logic board.

Related articles: 58442: Power On Self-Test Beep Definition - Part 2 95132: PowerBook G4: Installing or Replacing Memory

AirPort Card

AirPort Card not recognized

1. In Mac OS X, use Software Update in System Preferences, or in Mac OS 9 use the Software Update control panel, or see the Apple Software Updates web page to make sure the latest version of AirPort software is installed.

2. Restart the computer. Mac OS 9: Restart using Mac OS All extensions setting.

3. Mac OS X: Open AirPort in System Preferences and make sure AirPort is on and Base Station is selected. Mac OS 9: Open Airport in Apple Menu and make sure AirPort is on and Base Station is selected.

4. Reseat AirPort Card and make sure AirPort antenna cable is fully connected.

5. Remove and reinstall the AirPort software.

6. Replace with known-good AirPort Card.

7. Replace logic board.

Battery

Battery will not eject

1. Flip over the unit and release the battery latch by sliding the latch towards the PC Card button.

2. If the battery still will not eject, while holding the latch towards the PC Card button, use a small plastic ﬂat-blade tool to pry the battery around the battery latch.

3. Verify proper latch operation, by exercising the latch. If it does not move smoothly or evenly, replace the latch.

4. If the latch does exercise correctly, verify that the customer is not installing the battery with excessive force.

AirPort Card Symptom Charts

PowerBook G4 (DVI) Troubleshooting -

The battery won't charge

1. Remove any externally connected peripherals.

2. Try known-good power outlet.

3. Try known-good PowerBook (DVI) power adapter (922-5164) and power cord.

Note:

V erify that pow er adapter connector glows amber or g reen. If the power adapter light is green, turn over the computer and press the battery button. The battery lights should glow green and stay on if the power adapter is operating correctly.

5. Try known-good battery.

6. Turn off the computer. With a non-metallic tool, reset the power manager by pressing the reset button (located under the keyboard in the recess just left of the power button). Wait ﬁve seconds before continuing. Press the power button to start the computer.

Warning: Resetting the power manager will permanently remove a RAM disk, if present, and all of its contents. You will also need to reset the date and time (using the Date & Time control panel).

7. Replace DC-in board.

8. Replace logic board.

Battery Symptom Charts

PowerBook G4 (DVI) Troubleshooting -

Hard Drive

Internal hard drive will not initialize

1. Boot from Pow erBook G4 Software Install CD and see if the hard drive mounts on the desktop.

2. If in Mac OS X, 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 in Mac OS 9, launch Drive Setup and update hard drive driver.

4. Launch Drive Setup and update hard drive driver.

5. If no hard drive is found in Drive Setup, verify the hard drive cable connections.

6. Replace hard drive cable.

7. Replace hard drive.

Important:

refer to Article 31077: Hard Drive Data Recovery & Warranty Implications, for important information.

If the computer is under warranty and data recovery is required,

Keyboard

No response from any key on keyboard

1. Remove any connected peripherals.

2. Turn off the computer. Disconnect the keyboard connector and inspect connectors.

3. Boot from a Mac OS system CD to verify that it is not a software problem.

4. Replace keyboard.

5. Replace logic board.

The keyboard lock is damaged or won't lock

1. Verify that keyboard is installed properly so the lock lines up with the notch in the top case.

2. Replace keyboard.

Modem

No modem dial tone

1. Check that the correct modem is selected. In Mac OS X, chec k Network Setup . In Mac OS 9, check the Modem control panel.

2. Verify known-good analog (not digital) telephone line.

3. Verify known-good RJ11 telephone cable.

Hard Drive Symptom Charts

PowerBook G4 (DVI) Troubleshooting -

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. Check RJ-11 wires to modem ﬁlter board.

9. Verify modem wire’s 2-pin connectors are plugged into modem and modem ﬁlter board correctly.

10. Check modem wire. If damaged, replace rib frame and modem cable assembly.

11. Replace modem ﬁlter board.

12. Replace modem.

Modem does not respond (gets dial tone)

1. Check software.

2. Replace modem.

Optical Drive

The optical drive does not accept CD or DVD disc (mechanical failure)

1. Verify disc is not warped and is a 12 cm circular disc.

2. Verify disc is pushed almost all the way into the slot.

3. Check the optical drive ﬂex cable.

4. Replace optical drive.

The disc icon does not show up on desktop, or a dialog box appears to initialize disc, when inserting a read-only disc

1. Verify the correct type of disc is being used.

2. Use Software Update control panel to update ﬁrmware.

3. Try cleaning the disc. If it is dirty or scratched, it may not mount.

4. Try a different disc.

5. Select “Mac OS All” in the Extensions Manager control panel and restart.

6. Replace optical drive cable.

7. Replace optical drive.

Optical Drive Symptom Charts

PowerBook G4 (DVI) Troubleshooting -

PC Card

PC Card will not insert into the PC Card slot

1. Make sure the PC Card eject button is in, before attempting to insert a PC Card.

2. Make sure the PC Card is right side up (cards are keyed and cannot be inserted upside down).

3. Verify the PC Card is not warped or damaged in any way; if so replace the card.

4. Try a different PC Card.

5. Carefully raise the PC Card slot cover and check for a foreign object inside the slot.

6. Check to see if the AirPort Card antenna wire is protruding up into the PC Card slot opening from below. If so, open the computer to gain access to the AirPort Card location and reposition the antenna cable so that it does not sag down into the PC Card slot area (see AirPort Card Installation Instructions).

7. If the slot cover is preventing the card from being inserted, replace the top case.

8. Replace PC Card Cage.

Ports

The FireWire or USB port is not recognizing devices

1. Completely shut down, then press the power button to start the computer.

2. Use Software Update in Mac OS X system preferences (or the Software Update control panel in Mac OS 9) to verify that the latest software is installed.

3. Use Apple System Proﬁler to verify that the computer is recognizing the bus.

4. For USB, test ports with an Apple keyboard or mouse.

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. Verify that drivers are installed properly for third party, if needed.

7. If in Mac OS 9, boot with Mac OS All extension set.

8. Try a different cable.

9. If self powered make sure that the power supply is connected and device's LED indicates that it is getting power.

10. Replace logic board.

PC Card Symptom Charts

PowerBook G4 (DVI) Troubleshooting -

A USB 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. Try known-good Apple USB keyboard or mouse to verify the port is working properly.

3. Verify current driver for the device is installed.

4. If a camera, turn on camera after initiating download with camera application.

5. Try the other USB port.

6. Try different USB device on same port.

7. Eliminate chain by plugging in only one peripheral.

8. If in Mac OS 9, select “Mac OS All” in the Extensions Manager control panel and restart.

9. If in Mac OS 9, troubleshoot extensions and perform a clean installation of system software.

10. Replace logic board.

Sound

No sound heard and the Speakers section of the Sound control panel indicates that an external device is plugged in (to the headphone jack or USB ports)

1. If there is nothing plugged into the headphone jack or USB ports, the picture in the Speakers section of the Sound control panel should be of the internal speakers, as shown here.

2. If not, and if nothing is plugged in, try plugging in headphones or external speakers. Restart the computer. Remove the device.

Sound Symptom Charts

PowerBook G4 (DVI) Troubleshooting -

3. 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).

Warning: Resetting the PRAM will permanently remove a RAM disk, if present, and all of its contents. You will also need to reset the date and time (using the Date & Time control panel).

4. Replace logic board.

No sound from speaker(s)

1. Use the Software Update control panel to verify that the latest audio update has been installed.

2. Press the F3 key (with the fn ke y pressed and not pressed) to v erify that mute mode is not enabled.

3. Press the F4 or F5 key (with the fn ke y pressed and not pressed) to check the volume setting.

4. Verify no external speakers or headphones are plugged in.

5. Check the speakers tab on the Sound control panel to conﬁrm that the software is correctly seeing that there are no external speakers or headphones connected.

6. Shutdown 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).

Warning: Resetting the PRAM will permanently remove a RAM disk, if present, and all of its contents. You will also need to reset the date and time (using the Date & Time control panel).

8. Verify that the speaker cable is connected properly to logic board.

9. Check speaker cable. Verify left and right cable connections.

10. Check with headphones or external speaker , if audio is heard, replace heat e xchanger with speaker wire assembly.

11. Replace top case.

12. Replace logic board

Distorted sound from speakers

1. Verify sound is correct with external speakers/headphones. If sound is correct, check speaker wire and connections.

2. In Mac OS X check balance.

3. Compare same sound with two different units to make sure that sound is actually

Sound Symptom Charts

distorted.

PowerBook G4 (DVI) Troubleshooting -

4. Check speaker wire. If damaged, replace heat exchanger with speaker wire assembly.

5. Replace top case.

6. Replace logic board.

Video

No display, or dim display, but computer appears to operate correctly

1. Remove any connected peripherals.

2. Make sure F1 key is not stuck down.

3. Press the F2 key (with the fn key pressed and not pressed) to increase the screen brightness settings.

4. Reboot the computer—hold down the Control and Command keys and press the Power button to restart the computer. Or, press and hold the Power button for 5 to 10 seconds to shut down the computer, then press the Power button to restart.

5. Make sure using the PowerBook (DVI) power adapter (922-5164)

6. V erify inv erter ﬂex cable and LVDS cable connections are seated properly and that the cables are not damaged (refer to inverter board and display module replacement instructions).

7. Replace inverter board.

8. Replace display assembly.

9. Replace logic board.

Computer appears to work, but no video on external device connected to the TV out port (S-video out port)

1. The device must be connected to the S-video port while the Pow erBook is sleeping or off for the device to be recognized.

2. If running Mac OS X, verify that this issue is also in Mac OS 9.

3. V erify monitor that is used in testing is known-good and is supported by this computer.

4. Try different cable(s).

5. Replace logic board.

No video on an external VGA device connected to the external monitor (DVII) port

1. In the Resolution control strip, see if the device is being recognized. If so select resolution.

2. If running Mac OS X, verify that this issue is also in Mac OS 9.

Video Symptom Charts

PowerBook G4 (DVI) Troubleshooting -

3. V erify monitor that is used in testing is known-good and is supported by this computer.

4. Try another DVI-to-VGA adapter cable.

5. Restart the computer and test again.

6. Replace logic board.

Misc. Symptoms

Latch not working

Note:

When the display is being closed, a hook in the top of the display housing should be magnetically pulled down to the latch. When the latch button is pushed, the hook should release and retract into the display housing.

1. Verify hook operation by exercising the latch mechanism.

2. If the hook does not operate properly, replace the display assembly.

3. If the latch or latch button does not operate properly, replace the top case assembly.

The Date and Time settings reset all the time

Note:

Resetting the power manager or PRAM resets the date and time.

1. Do a backup battery test:

• Set the date and time.

• Perform a Shut Down from the Apple menu or Special menu.

• Remove the main battery and disconnect the power adapter for 10 minutes.

• Connect the power adapter, insert the battery, and power on the computer.

• If the date and time were lost the backup battery may be dead or discharged.

• Remove the main battery from the unit and leave the PowerBook plugged in for at least 5 hours.

Note:

If a discharged main battery is installed in the computer, recharging the backup battery may take up to 48 hours to completely charge. It is okay to use it while it is charging.

• If the date and time still reset, replace the backup battery.

2. If not the backup battery, replace logic board.

Note:

For main and backup battery part numbers, refer to article 11751:

Macintosh Family: Batteries and Part Numbers.

AirPort Card installed and received a -3278 error

1. Use Software Update control panel or see the Apple Software Updates web page to make sure the latest version of AirPort software is installed.

2. Boot using Mac OS All extensions setting.

Misc. Symptoms Symptom Charts

PowerBook G4 (DVI) Troubleshooting -

3. Reseat AirPort Card.

4. Remove and reinstall the AirPort software.

5. Replace with known-good AirPort Card.

6. Replace logic board.

The microphone is not working

1. Check the Sound control panel and verify that the selection for input is the built-in microphone.

2. Check the signal level and level meter and adjust the gain.

3. Remove Sound Preferences from the Preferences folder and restart.

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).

Warning: Resetting the PRAM will permanently remove a RAM disk, if present, and all of its contents. You will also need to reset the date and time (using the Date & Time control panel).

5. If no sound as well as microphone is not working, verify cable connections.

6. Replace top case.

During startup boot sequence and before reaching Finder, the following dialog box appears: “The built-in memory test has detected an error”

1. If a RAM card is installed in the upper expansion slot (if not, skip to next step), remo v e it and restart. Refer to Memory Card Replacement instructions.

• If symptom does not repeat, replace RAM card.

• If symptom repeats, replace RAM in lower RAM slot with known-good SDRAM SO-DIMM RAM card and restart.

- If symptom repeats, replace logic board.

2. If a RAM card is not installed in the upper expansion slot, replace RAM in lower RAM slot with known-good SDRAM SO-DIMM RAM card and restart. Refer to CustomerInstallable-Parts Memory Replacement instructions.

• If symptom repeats, replace logic board.

Misc. Symptoms Symptom Charts

PowerBook G4 (DVI) Troubleshooting -

LCD anomalies Go to : Pixel anomalies

A certain number of pixel anomalies are inherent in liquid crystal display technology and vary by many factors, including type of technology.

Many anomalies observed by customers are considered normal or are the result of lint or dust particles resting on the front of the display. It is important to understand what type of anomaly a customer sees in order to determine whether further analysis is necessary. In many cases all that may be necessary is a gentle cleaning of the display face using the provided cleaning cloth.

IMPORTANT : Providing a replacement display to satisfy a customer may not be effective because the

replacement display may have more or different types of visible anomalies than the original display, and still be within specifications.

Knowledge Base Article 22194 can be indicated to customers as public explanation from Apple side.

Industry standards used by all manufacturers are specifying a certain number of minor defects, as generally accepted or creating an acceptable situation. This means that the level of quality in the industry includes some level of pixel-defect.

The following sentences can be used with customers’ complains

Copied from SONY documentation (Sony VAIO web Support)

• High precision technology is used to manufacture these LCDs to maintain a high standard of operation. However in all LCD panels there may be a small number of pixels that do not change color. This is a normal occurrence for all LCD displays from all manufacturers and should not be noticeable or objectionable under normal operation.

• Sometimes the pixels are noticeable only during booting or on an all white or all black screen.

• The LCD screen is manufactured using high precision technology. However, there may be some tiny black spots and/or bright spots (red, blue or green in colour) that constantly appear on the LCD screen. These spots occur normally in the manufacturing process and do not effect the recorded picture in any way. Effective number of pixels is 99.99% or more.

Copied from COMPAQ documentation (Compaq FAQ on Compaq’s web Support)

• Note that if you have the smallest number of dead pixels, your replacement display panel may have more, use your judgement before deciding that you have a defective panel.

Copied from DELL documentation (Dell web : http://support.euro.dell.com/fr/fr/kb/document.asp?DN=FA1018431)

• The liquid crystal display (LCD) screens built into portable computers and flat-panel monitors are manufactured using rigid quality control standards. These manufacturing standards ensure that the LCD screen is clear and viewable.

• During the manufacturing process, it is not uncommon for one or more pixels to be fixed in an unchanging state. The visible result is a fixed pixel that appears as an extremely tiny discolored spot, either a dark spot or a bright spot.

Copied from TOSHIBA documentation (Toshiba web Support)

• Due to current manufacturing methods and the high number of transistors in the TFT Color LCD, a few nonconforming pixels may be visible. There are over a million transistors in a typical TFT screen. When any one of those transistors is not lighting as designed, the pixel is called nonconforming. Nonconforming pixels typically appear as tiny colored dots (red, blue, green, etc.) or as black dots in contrast to the projected background color of the LCD module.

• Quality inspections, performed by the LCD module manufacturers, include limits for nonconforming pixels. Nonconforming pixel limits (10 to 18 pixels) are set solely by the LCD module manufacturers and not by specific computer manufacturers. These limits are defined by the manufacturing processes and are specific to screen characteristics which include : * physical size of module. * display type (SVGA, XGA, VGA). * screen resolutions available.

• LCD Module manufacturers continually strive to upgrade processes used in manufacturing as well as the Quality Specifications which include the limits on nonconforming pixels allowed for LCD modules for use in portable computer displays.

(End

Pixel anomalies

When speaking with Apple Technical Support, it may be necessary to use a pocket microscope, jeweler's loupe, or other magnifying device to properly identify and count each subpixel anomaly.

Displaying all white, red, green, and blue screens makes locating and viewing pixel anomalies easier. A subpixel that is always on should be referred to as a bright subpixel anomaly. A subpixel that is always off should be referred

to as a dark subpixel anomaly. When necessary, portable and display products may be dispatched for evaluation by the Apple Repair Center.

Go to : LCD anomalies

(End

Replacement Instructions

Follow the instructions in this sheet carefully. Failure to follow these instr uctions could damage your equipment and void its warranty.

Note : Written and video instructions covering customer-installable parts are available at http://www.info.apple.com/installparts/.

War ning : During this procedure, keep small parts away from children.

Tools Required

The only tool required for this procedure is a jeweler’s flat-blade screwdriver (if keyboard is locked).

Removing the Installed Keyboard War ning : Always shut down your computer before opening it to avoid damaging its internal components or

causing injury. After you shut down the computer, the internal components can be ver y hot. L et the computer cool down before continuing.

1. Place your computer on a clean, flat surface.

2. Shut down your computer and wait thirty minutes before continuing.

3. Disconnect the power cord and any other cables connected to the computer.

4. Close the computer and turn it over.

5. Slide the battery latch (Figure 1A) to the right to remove the batter y (Figure 1B). Removing the battery will prevent you from accidentally tur ning on the computer. War ning : Removing the battery before shutting down your computer may result in data loss.

6. Turn over the computer.

7. Raise the display so you can access the keyboard.

1B073-0685 Rev. A PowerBook G4 (DVI) - Keyboard

English

Keyboard

AppleCare

Figure 1

8. Make sure the keyboard locking screw, located in the small plastic tab to the left of the Num L ock key (Figure 2), is not in the locked position. Your PowerBook comes with the keyboard unlocked, so unless you or someone else locked the keyboard, you can skip this step.

To unlock the keyboard, turn the screw 1/2 turn.

9. Release the keyboard by pulling down on the keyboard release tabs (located to the left of the F1 and F12 keys) (Figure 3), then lift the top portion of the keyboard up slightly, and toward the display.

10. Flip the keyboard over and lay it on the palm rests and trackpad (Figure 4).

2 B073-0685 Rev. APowerBook G4 (DVI) - Keyboard

Figure 2

Figure 3

Figure 4

11. Touch the computer’s inside framework (a dull gray conductive composite material) to discharge any static electricity, as shown (Figure 5).

Important : To avoid electrostatic discharge damage, always ground yourself by touching the computer’s framework before you touch any parts or install any components inside the computer. To avoid static electricity building back up in your body, do not walk around the room until you have completed your installation and closed the computer.

12. Locate the keyboard cable connector (Figure 6).

13. Pull up on the connector, from side to side if needed, to disconnect it from the computer.

14. Set the keyboard aside.

3B073-0685 Rev. A PowerBook G4 (DVI) - Keyboard

Figure 5

Figure 6

Installing the Replacement Keyboard

1. Lay the replacement keyboard in the correct orientation over the keyboard opening, then flip it toward you and lay it face down on the palm rests and trackpad to expose its connector cable (Figure 7).

2. Firmly insert the keyboard cable connector into its connector on the computer.

3. Flip the keyboard back toward the keyboard opening in the case.

4. Hold the keyboard at an angle above the keyboard opening, and insert the tabs on the bottom edge of the keyboard into the slots below the edge of the opening (Figure 8).

Important : Make sure that all the tabs are seated and that the keyboard rests flush against the edge of the opening.

5. Lay the keyboard flat into the keyboard opening.

4 B073-0685 Rev. APowerBook G4 (DVI) - Keyboard

Figure 7

Figure 8

6. Pull down on the keyboard release tabs and then press down on the top portion of the keyboard (Figure 9). Release the tabs to secure the keyboard in place.

7. Close the display and turn the PowerBook over.

8. Replace the battery into the batter y compartment (Figure 10).

Important : Make sure that the battery locks securely into place and that the batter y latch is slid all the way into the locked position.

9. Reconnect the power cord and any other cables that were connected, and restart your computer.

War ning : Never turn on your computer unless all of its inter nal and exter nal parts are in place and it is closed. Operating the computer when it is open or missing parts can damage your computer or cause injury.

5B073-0685 Rev. A PowerBook G4 (DVI) - Keyboard

Figure 9

Figure 10

 Apple Computer, Inc.

© 2002 Apple Computer, Inc. All rights reserved. Under the copyright laws, this document may not be copied, in whole or in part, without the written consent of Apple. The Apple logo is a trademark of Apple Computer, Inc., registered in the U.S. and other countries. Use of the “keyboard” Apple logo (Option-Shift-K) for commercial pur-

poses without the prior written consent of Apple may constitute trademark infringement and unfair competition in violation of federal and state laws. Every effort has been made to ensure that the information in this document is accurate. Apple is not responsible for printing or clerical er rors. Apple Computer, Inc.

1 Infinite Loop Cupertino, CA 95014-2084 USA + 1 408 996 1010 http://www.apple.com

Apple, the Apple logo, and PowerBook are trademarks of Apple Computer, Inc., registered in the U.S. and other countries.

6 B073-0685 Rev. APowerBook G4 (DVI) - Keyboard

Replacement Instructions

Follow the instructions in this sheet carefully. Failure to follow these instr uctions could damage your equipment and void its warranty.

Note : Written and video instructions covering customer-installable parts are available at http://www.info.apple.com/installparts/.

War ning : During this procedure, keep small parts away from children.

Tools Required

The only tool required for this procedure is a jeweler’s flat-blade screwdriver (if keyboard is locked).

Opening the Computer War ning : Always shut down your computer before opening it to avoid damaging its internal components or

causing injury. After you shut down the computer, the internal components can be ver y hot. L et the computer cool down before continuing.

1. Place your computer on a clean, flat surface.

2. Shut down your computer and wait thirty minutes before continuing.

3. Disconnect the power cord and any other cables connected to the computer.

4. Close the computer and turn it over.

5. Slide the battery latch (Figure 1A) to the right to remove the batter y (Figure 1B).

Removing the battery will prevent you from accidentally tur ning on the computer. War ning : Removing the battery before shutting down your computer may result in data loss.

6. Turn over the computer.

7. Raise the display so you can access the keyboard.

1PowerBook G4 (DVI) - Memory

English

Memory

AppleCare

Figure 1

To unlock the keyboard, turn the screw 1/2 turn.

10. Flip the keyboard over and lay it on the palm rests and trackpad (Figure 4).

2 PowerBook G4 (DVI) - Memory

Figure 2

Figure 3

Figure 4

11. Touch the computer’s inside framework (a dull gray conductive composite material) to discharge any static electricity, as shown (Figure 5).

Removing the Installed Memory Card

1. To remove a memory card, locate the brackets that secure the card on both sides (Figure 6). Carefully spread the brackets

apart until the card releases on each side. Pull the card up and out.

Note : If there is a memor y card in the upper memory slot (Figure 6A), it must be removed before removing a card in the lower slot (Figure 6B).

3PowerBook G4 (DVI) - Memory

Figure 5

Figure 6

Installing the Replacement Memory Card War ning : When handling a memory card, do not touch its gold connectors. Handle the card only by the edges.

1. To install the memory card, line up the notch in the card with the small tab in the memor y slot. Hold the card at a 30-degree angle (Figure 7A), and then push the card into the slot until it is firmly seated.

Note : You may feel some resistance. If you are having trouble inserting the card, try pushing one side at a time.

2. Gently push the card down until the two brackets on either side of the card lock into place (Figure 8).

4 PowerBook G4 (DVI) - Memory

Figure 7

Figure 8

Closing the Computer

1. Flip the keyboard back toward the keyboard opening in the case.

2. Hold the keyboard at an angle above the keyboard opening, and insert the tabs on the bottom edge of the keyboard into the slots below the edge of the opening (Figure 9).

Important : Make sure that all the tabs are seated and that the keyboard rests flush against the edge of the opening.

3. Lay the keyboard flat into the keyboard opening.

4. Pull down on the keyboard release tabs and then press down on the top portion of the keyboard (Figure 10).

5. Release the tabs to secure the keyboard in place.

6. Close the display and turn the PowerBook over.

5PowerBook G4 (DVI) - Memory

Figure 9

Figure 10

+ 90 hidden pages

Apple PowerBook G4 (DVI 667 and 800MHz) 02 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Troubleshooting

How to Use the Symptom Charts

Startup

Error Beeps

AirPort Card

Battery

Hard Drive

Keyboard

Modem

Optical Drive

PC Card

Ports

Sound

Video

Misc. Symptoms

Replacement Instructions

Tools Required

Keyboard

Installing the Replacement Keyboard

Replacement Instructions

Tools Required

Memory

Removing the Installed Memory Card

Closing the Computer