Question about Apple G4 Computers & Internet

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My Powerbook G4 won't boot any more. When attatching the power suppl there is a short click like a shrt circuit at the conection which renders the adaptor dead for a while. I've tried replacing the ac board but still had the same problem.

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  • Expert
  • 80 Answers

Boot up using the osx disk.

Posted on Jan 20, 2014

6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

  • 13 Answers

SOURCE: powerbook g4 going to white screen only!!

Do you have any external harddrive attached to it? If so, remove it before restarting. Try to start it up in safe mode by holding the Shift button down at startup: http://support.apple.com/kb/HT1455

Posted on Apr 16, 2009

Joed911
  • 4338 Answers

SOURCE: G4 Aluminum Powerbook 15in 1.5ghz will not power up :(

Have you solved your problem.
Since you are taking it apart look at the folowing:

PMU reset:

The PMU is a microcontroller chip that controls power functions for the computer. The PMU is a computer within a computer, as it has its own memory, software, firmware, input/output, a CPU, and more. Its function is to:
§ Tell the computer to turn on, turn off, sleep, wake, idle, etc.
§ Manage system resets from various commands.
§ Maintain parameter RAM (PRAM).
§ Manage the real-time clock.
Over time, the settings in the Power Manager may become unusable, which can result in operational anomalies with the computer. Examples include not turning on, not waking from sleep, or not seeing devices plugged into the USB and FireWire ports, among others.
Resetting the PMU is not intended for resolution of a stall or situation in which the computer is unresponsive. A PMU reset should not be necessary except as a last resort in cases where a hardware failure of the power management system is suspected. Performing a PMU reset returns the computer hardware, including NVRAM, to default settings and forces the computer to shut down.
http://support.apple.com/kb/HT1939
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.
Thanks, Joe



Posted on May 16, 2009

RescueTechLA
  • 2653 Answers

SOURCE: Restore CD

You don't need a "restore" cd.

You can just use any copy of Tiger.

Borrow one!

Posted on Jun 15, 2009

Joed911
  • 4338 Answers

SOURCE: my mac powerbook g4 12'' wont chime or boot just

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

Posted on Jun 26, 2009

  • 1099 Answers

SOURCE: My mac G4 powerbook doesnt start up. There are

It sounds like the system is corrupted. What I would do is to get your instal disk and boot up holding down the c key on your keyboard. Once you have booted up go to the file menu and run disk utility to verify and repair the hard drive if necessary. Then go to the instal menu and instal a fresh system remembering to preserve the users data so you do not wipe anything. Hopefully this will work.

Posted on Nov 12, 2009

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1 Answer

Reset button on a powerbook g4


The Powerbook G4 power button functions like a reset button if you hold the power button in for a few seconds until the computer powers down.
  1. Hold the power button in for a few seconds (until you see the screen turn off/go black and hear the fans & hard drive stop spinning).
  2. Press the power button again to turn your computer on.
  3. If you have more trouble, you may need to boot in Safe Mode or "perform a Safe Boot":
    Press and hold down the "Shift" key immediately after you hear the start-up tone. Release the "Shift" key when the gray Apple icon appears on the screen.

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How to repair PowerBook G4 Power connector


<p>The PowerBook G4 is a Mac laptop, which was popular before the launch of the new MacBook. But the cable for this computer is not much different than cable in many other notebooks. These cables can break down over time, mainly because of the shorts in the wire. These problems can be solved by opening the line. <br /> <p><br /> <p>1. Turn on the PowerBook and plug into the outlet side of the unit. Insert the end of the column with a free exit. <br /> <p><br /> <p>2. Look for the short circuit in line with the thumb and forefinger along the length of the cable and secure it temporarily. When the light emitting diode light at the end of the adapter starts flashing, you'll notice that recognize the short debate. <br /> <p><br /> <p>3. Unplug the power cord and your computer and use your wire cutters to about an inch from the sheath instead of short takeoff and landing runways. Make sure you cut the wires of the real. <br /> <p><br /> <p>4. Turn the frayed ends of the wires short to connect. <br /> <p><br /> <p>5. Pass the ribbon around the vaginal opening, completely covers the exposed wires. <br />

on Jun 22, 2011 | Computers & Internet

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LCD Display Problems with Apple 15" PowerBook G4 Aluminum 1.25 GHz Mac Notebook


During boot-up, Apple logo heavily pixelated. After boot-up, display a riot of colors and vertical lines with nothing readable. External monitor works well

I'll appreciate any input.
~ JO

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If you have the operating systems disk, you can boot from the disc, and once the setup come dump, choose password reset from the "utilities" drop down menu. Change your password, shutdown, and reboot.

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cheak:
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My powerbook g4 won't reboot. It freezes at the grey screen with the apple and won't let me log on .


Power the machine down. Press the power button, then immediately press and continue to hold the shift key. This will perform a "safe boot," skipping any of the boot-time software you may have added to your machine. If it still fails to boot, more involved diagnostics are required.

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Use the install discs that came with the machine. Insert the disc 1, shut down the machine, turn it back on and press and hold the option key until the DVD icon shows. Then click on the icon and then click on the right arrow. When the disc boots you need to go to the top and find the disc utility folder. Then select reset password. Then choose restart.

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After shutting down my powerbook G4, it reboots itself later


It may be that you have a scheduled boot up set. Go to system preferences and then to energy saver in the bottom right corner there is a button named schedule click on it see if it is set for startup or wake and if it does uncheck the box. Hope this helps.

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1 Answer

Powerbook Aluminum G4 15 booting up problem


The backup battery connects directly to the logic board. From the symptoms you are describing (rather clearly, thank you), it seems apparent that your logic board may be faulty.
There are two more things you can try.
1) Reset Open Firmware: Unplug-replug your backup battery, then boot the system holding down Control-Option-O-F. Your machine will boot into Open Firmware. Type the following commands, pressing the "return" key at the end of each one:
reset-nvram
set-defaults
reset all
Your machine should restart at this point. If it starts successfully, you should be done. Otherwise,
2) Reset the Power Manager. Turn the machine all the way off (no power). Simultaneously press Shift-Control-Option-power button, then release. (Do not press the fn (Function) key during this sequence.) Wait five seconds, then press the power button. If it starts successfully, you should be done. Otherwise, you will need to see a man about a logic board, which is probably not a cost-effective repair on a 1GHz G4.

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