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G4 PowerBook Titanium startup crash

G4 powerbook constantly thinks it is being dropped and freezes the hard drive and goes into standby mode. It usually was a result of too much weight being applied by my left arm using the keyboard.. so I would use a usb keyboard not to upset the machine. the problem has continued to get worse and now will not start - making the crash noise, three beeps and the sleep light flashing.. Is there a piece of hardware that can be replaced or removed; or is there much bigger problems going on..

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4 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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Joed911
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SOURCE: how to replace the lcd on a powerbook g4 model m8407

Here is a service guide for the Powerbook G4. It has the step by step instructions.

http://www.powerbookmedic.com/xcart1/files/G4alum12.pdf

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 Dec 11, 2008

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Joed911
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SOURCE: PowerBook g4 won't wake from

Found this, it may help you solve your issue. Power issues on Mac G4 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




http://support.apple.com/kb/HT1939

Posted on May 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

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Here is a service guide for the Powerbook G4. It has the step by step instructions.

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copy and paste the complete link into your browser.
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