Question about Apple Powerbook G4 15" 1.5GHz SuperDrive Mac Notebook

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Startup chime on my mac powerbook g4 stopped working. please help !

When I boot up my laptop, it switches on but no startup chime. sound works O.K afterwards

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The parameter ram reset will reset that and other basics back to factory without losing any data. To do this, take a moment and find the command, option, p and r keys and figure out how you are going to hold them ALL down at together. The mac should be off, if not, shut it down (not restart-shutdown). Now, touch the power button and immediately hold down the cmd-option-p-r keys. Hold them for the screen to cycle black to gray THREE times (each taking about 15 seconds), then let go and let the mac complete the boot cycle. On the second cycle, you should have already heard the "chime" appear. That's it! Good Luck.

Posted on Jan 02, 2015

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Posted on Jan 02, 2017

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Startup switch on PB G4 17 not getting apple sound, takes numerous times to boot up. Using Tiger OS, upgraded to latest. Works fine, otherwise.


If a Mac is shut down while the volume is set to zero, the standard Apple startup chime will not sound, so it is impossible to say whether or not this symptom indicates a problem.
For a startup issue such as this, I would recommend zapping the PRAM and resetting Open Firmware.
To zap the PRAM, start with a powered-down machine, press the power button, then immediately hold down the four keys: command, option, P, R. After ten seconds or so, you should hear the optical drive reset, and then the startup chime (because the volume is reset to full by this procedure). Ten more seconds, another reset, another chime. After the second time you hear the chime, release the keys.
Shut the machine down again (if it doesn't start up successfully, hold the power button until the power goes off). Press the power button, then immediately hold down the four keys command, option, O, F. You will see some tech-speak on the screen, then it will wait for input. Enter the following three lines, pressing the "return" key at the end of each:
reset-nvram set-defaults reset-all
After the last line, your Mac will reboot itself. It should now boot much more reliably. If it doesn't, chances increase that you have a hardware problem. You may want to run the Apple Hardware Test from the DVDs that came with the PowerBook to check your memory and logic board. Failing this, you are in for a trip to the shop.

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My powerbook G4 does not chime!!


I suggest you plug it into AC power, then boot with Command-P-R held down until you hear the unit chime twice, then release it. Hopefully, it will boot after this.
If not, boot with Command-O-F held down; when you reach the command line, type
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reset-all [return-key]
If it doesn't boot after that, you have deeper issues if the machine is actually turning itself on and off.

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thi guys will help Micromen - London

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Computer cannot find operating system files. Start up from Install Disk or Utility disk and re-install system. Hold down C key while starting from disk.

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My mac powerbook g4 12'' wont chime or boot just comes on and screen changes colors every 2 seconds


Resetting PRAM and NVRAM
  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.
Your computer's PRAM and the NVRAM are reset to the default values. The clock settings may be reset to a default date on some models.
If I could be of further assistance, let me know. If this helps or solves the issue, please rate it.
Thanks, Joe

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Apple g4 aluminium


What sound card are you using? It has to be external for you to switch it. When a computer is dropped, the hard drive and logicboard are under severe danger. The drive is constantly spinning anywhere between 4200 and 10k rpms. If the logicboard endures any shock there could be endless possibilities to failures in addition to them being intermitten. Can you specify which G4 you have, in processor speed and machine/display size? And I take it when you mean " no sound", you also mean no Apple start-up chime when you boot the machine?

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