Question about Apple PowerBook G4 Mac Notebook

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Have an Apple Laptop computer G4. It will shut off randomly without notice. I then have to take out the battery and restart it by hold the on button for 5 sec. It does this every time I get on. It's about 5 years old and in very good condition minus this problem. I dont know if its the motherboard or if I need a new battery. However, it shuts off even if its connected to the power cord. I have also taken the battery out and have just used the power cord to see if it is my battery but the computer still shuts off. Thanks! E

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  • Apple Master
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Try resetting thr PRAM:

http://support.apple.com/kb/HT1379


or Power Management:
http://support.apple.com/kb/HT1431?viewlocale=en_US

Click on this link or copy and paste the complete link into your browser.

If I could be of further assistance, let me know. If this helps or solves the issue, please rate it and give a testimonial for my response. Happy Holidays!

Thanks, Joe

Posted on Dec 29, 2010

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Posted on Jan 02, 2017

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2 Answers

Computer won't show start up screen, only shows different colors ie. green, then pink, blue... i took out the battery and started it without the battery and got the same results.


First you need to reset the PRAM:
  1. Shut down the computer.
  2. Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
  3. Turn on the computer.
  4. Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
  5. Hold the keys down until the computer restarts and you hear the startup sound for the second time.
  6. Release the keys.
Next you need to reset the PMU (power management unit). This will depend on the model of your iBook so follow the instructions on Apples page:
http://support.apple.com/kb/HT1431#faq6

Hope this gets you going again

All the best
Sean
PiDigital

Jan 17, 2009 | Apple iBook G4 Mac Notebook

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