Resetting the Power Manager Unit PMU

The PMU reset key sequence has been changed. Use the following procedure or the PMU Reset pad (see PMU RESET pads on logic board, below). 1. If the computer is on, turn it off. 2. Disconnect the power adapter and remove the main battery. 3. Hold the power button down for five seconds, then release. 4. Install the main battery and connect the power adapter. 5. Press the power button to restart the computer. The pads are located near the edge of the logic board, just above center of the hard...

Application Quits Kernel panic or other booting problems

If a specific application quits, replace the application. 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. Run Disk Utility from the Software Install and Restore DVD. 4. Perform a clean install of system software with the software install and restore disc that came with the computer. Note Restore disc images are available at http service.info.apple.com. Select Disc Images. 6. Run Apple...

And display is not lit

Remove any connected peripherals and eject any PC card. 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 a known-good Apple 65W Portable Power Adapter and power cord or plug to a known-good power outlet make sure the DC plug is firmly inserted. The DC plug should light up, if not, replace Sound DC-in board. Important The Apple 65W Portable Power Adapter is highly...

Replacement Procedure

Verify that the Mylar and rubber blocks are installed or transfer from the replaced board. The following procedures show how to replace the thermal materials Warning Whenever the logic board is separated from the heatsink, the thermal grease must be replaced. Failure to do so can cause the computer to overheat and Use a black stick to remove as much thermal grease as possible Use an alcohol wipes to clean the mating surface. Important Avoid unnecessary contact with new thermal material, as...

Procedure

Keyboard for the PowerBook G4 15-inch Double-Layer SD and 15-inch 1.67 1.5GHz computers have different construction, and removal and installation procedures than The PowerBook G4 15-inch Double-Layer SD keyboards are not interchangeable with previous models. Verify that the correct replacement keyboard is ordered, and or top case if replacing. The keyboard comes as a multi-layered assembly, and all include backlighting. Do not disassemble the keyboard assembly. Dust, fingerprints, or...

Sleep indicator Solid light during booting

Starting with the PowerBook G4 Double-Layer SD models, the sleep indicator light in the lid button has a new behavior during startup. When you first turn the PowerBook G4 on, the sleep indicator will turn on. As the computer starts up, the indicator stays on until the display turns on. This light can be used as a diagnostic to determine at startup whether the main logic board is getting power. This new indicator will help troubleshoot dead unit issues versus no video issues If you see the sleep...

Air Port Extreme not recognized

In Mac OS X, use Software Update in system preferences or see the Apple Software Updates web page to make sure the latest version of AirPort Extreme software is installed. 3. Open AirPort in system preferences and make sure AirPort is on and Base Station is selected. 4. Check the AirPort Extreme w Bluetooth card flex cable connection to the logic board. 5. Remove and reinstall the AirPort Extreme software. 6. Replace with known-good AirPort Extreme w Bluetooth card.

Preliminary Steps

Before you begin, remove the following 1. Slide a black stick behind the inverter to carefully loosen the adhesive at the back of the inverter board at the locations shown below. Important The inverter board can be damaged if bent. Handle the board carefully to avoid bending the board. 3. Disconnect the inverter cables, shown here, and remove the board. 3. Disconnect the inverter cables, shown here, and remove the board. Replacement Note The replacement inverter board is wrapped in an...

No keyboard illumination

Go to Keyboard system preference pane and make sure the Illuminate keyboard in low light conditions check box is checked. Try using system in a dimly lit environment. Note The keyboard illumination is not bright enough to be seen in most well lit spaces. In order to view the key being illuminated, the ambient light needs to be dim. H-r-y Knpiii EjI Ofh gt Un lt ll mnm ilkiffliu ktpftMid in to -1 s 'n teriftiiGrts T-jip wf n krrliu4. U ,-, iOI uHi fill n i jD 2. Check the keyboard backlight...

Short battery life

86440, PowerBook, iBook Battery Life, for tips on extending battery life and explanations of some concepts of battery use. 88231, PowerBook and iBook Apple Power Adapter. 50666, Tips for maximizing your PowerBook and iBook battery charge 86284, Calibrating your computer's battery for best performance There is a system issue not the battery . - If you have the customer's power adapter, plug it into a known good outlet and verify that it can charge the system. Also make sure it is the correct...

The battery wont charge

Remove any externally connected peripherals. 2. Try known-good power outlet. 3. Connect known-good 65W power adapter and power cord or plug make sure the DC plug is firmly inserted. The DC plug should light up, if not, replace Sound DC-in board. 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. Important The Apple 65W Power Adapter is highly recommended be...

Air Port connection is slow

Move computer closer to AirPort Base Station or other AirPort device. 2. Too many users are accessing network at the same time causing heavy network traffic. To improve network connection speed, add additional AirPort Base Stations. 3. Check for other changes in the environment that may cause interference with the AirPort signal. 4. Use Software Update in system preferences or see the Apple Software Updates web page to make sure the latest version of AirPort Extreme software is installed. 6....

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. When this occurs, the sleep LED will stay on occasionally flashes. Note The PowerBook G4 15-inch Double-Layer SD uses PC4200 DDR2 SDRAM SO-DIMMs, with a maximum height of 1.25-inch 30 mm . These modules are keyed differently than previous PowerBook G4 1.25-inch RAM. Refer to Memory Card Take Apart...

Apple Service Diagnostic ASD

Apple Service Diagnostic

MacTest Pro software does not work on this computer since the PowerBook G4 15-inch FW 800 and forward are Mac OS X only systems. ASD is the replacement and can be downloaded from Knowledge Base article 112125 Service Diagnostics Matrix. Important ASD 2.6.3 is backwards compatible to the PowerBook G4 1GHz 867MHz and later. Apple Service Diagnostic Main screen Apple Service Diagnostic Select Tests tab Apple Service Diagnostic Select Tests tab Apple Service Diagnostic Hardware Info tab f f Test...

Restart dialog box appears Mac OS X kernel panic window or Gray screen during startup

Hold down the Power button for several seconds or press the Restart button. Veuillez red marrer votre ordinateur. Maintenez la touche de d marrage enfonc e pendant plusieurs secondes ou bien appuyez sur le bouton de r initialisation. Sie m ssen Ihren Computer neu starten. Halten Sie dazu die Dnschal taste einige Sekunden gedr ckt oder dr cken Sre die Neustart-Taste. 1. Make sure all external devices are disconnected and any PC card ejected. If kernel panic...

Computer beeps three times at startup

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 , remove 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. 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...