Apple PowerBook G4 15 Inch 1.67 1.5GHz User Guide
![Apple PowerBook G4 15 Inch 1.67 1.5GHz manual cover](/images/ac55cf17d1cd2bc7c9190838/thumbs/thumb175x175.webp)
To reset the PRAM on your PowerBook G4, restart your computer and hold down the Command (⌘), Option, P, and R keys simultaneously. Keep holding them until you hear the startup sound twice.
If your PowerBook G4 does not start up, try checking the power adapter and ensuring it's properly connected. You can also try resetting the PMU by shutting down the computer, removing the battery and power adapter, and pressing the power button for 5 seconds.
To maintain the battery life of your PowerBook G4, ensure that you calibrate the battery by fully charging it and then running it down completely once a month. Also, avoid exposing it to extreme temperatures.
Yes, the RAM on your PowerBook G4 15 Inch can be upgraded. It supports a maximum of 2GB of DDR SDRAM. Make sure to use compatible memory modules for the upgrade.
If the display is not working, try resetting the PRAM and PMU. Also, check for any loose connections or debris in the display hinge. Connecting to an external monitor can help identify if the issue is with the display itself.
To clean the keyboard, turn off and unplug your PowerBook G4. Use a soft, lint-free cloth slightly dampened with water or isopropyl alcohol. Avoid getting moisture into the openings.
To reinstall the operating system, insert the Mac OS X installation disc, restart the computer, and hold down the C key. Follow the on-screen instructions to reinstall the OS. Make sure to back up your data before proceeding.
Ensure that the AirPort card is installed and enabled. Click on the AirPort icon in the menu bar and select the desired network from the list. Enter the network password if prompted.
If the CD/DVD drive is not reading discs, try cleaning the disc and the drive with a soft cloth. Restart the computer and check for software updates that might address drive issues.
You can back up your data by connecting an external hard drive and using software like Carbon Copy Cloner or Time Machine. Ensure that the backup drive has enough space to accommodate your files.