Question about Apple MacBook Pro Laptop Computer with Intel Duo Core 15.4 Inch PC Notebook

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Why is my mac locking up?

Recently my mac has been freezing randomly.

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Try using Disk Utility to repair permissions on the startup volume. Reboot.
Another option is to manually download the most recent OS patch from Apple and reapply it.
Worst case scenario, boot from the original CD, or most recent OS disk you have purchased, (hold down 'C' while booting) and do an 'archive and install'. This will reinstall your system - pay attention while doing this, you don't want to wipe your hard drive.  As always back up your stuff first.

Did the problem start after installing any new software or hardware?
Faulty RAM can be an issue also - if you have two chips, power down, remove one and run it for a while on one - see how that goes. If you can, (depend on the model) then swap them and do the same with the other one. Random freezes can be RAM related.
More detail about when it locks up would be helpful.
Papa

Posted on Jun 20, 2008

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If by "lock up" you mean the mouse/keyboard freezes and the machine becomes unresponsive to any input, and you have already replaced the memory with a known good memory, you may have a logic board problem (not necessarily, but quite possible).
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My laptop shuts down randomly, with no warning. It seems to happen both when the laptop is plugged in to an outlet and when it is not. I'm not sure what is happening.


First off, it's a Mac. It's been an ongoing issue with Macs for the past 10 years. The old iMacs had to be picked up and dropped to turn on or off.

For your solution though, I recommend the following:

If you have recently installed 10.4.7, change back to 10.4.6. For some reason, this seems to be fixing the problem on a lot of Mac systems.

If that is not the case, and it's warm where you are, try getting a cooling dock to keep it on. This would be the case if it was happening more during the daytime while it is warm out than at night.

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gtabblt.gif Identifying lock-ups and freezes gtabblt.gif Close locked-up programs and locate problem software gtabblt.gif Uninstall and re-install the problem software gtabblt.gif Contact the software vendor gtabblt.gif Understanding backwards compatibility issues gtabblt.gif Change the operating system emulation with the Program Compatibility Wizard gtabseps.gif This document pertains to HP Notebook PCs with Windows Vista. Identifying lock-ups and freezes This document will help you to locate and troubleshoot programs that cause your notebook to hang, freeze, or lock-up. Print this document or save it to your hard disk drive to have the reference available after disconnecting from the internet. Symptoms of notebook lock-ups, freezes, and hangs include:
  • Nothing moves or blinks on the computer display.
  • The computer will not respond to the mouse or keyboard.
  • An error message appears and will not go away.
Freezes, crashes, and lock-ups may be caused by programs locking up resources, software conflicts, or older programs being incompatible with newer operating systems. Follow the steps in this document, in order, until the problem is resolved. Close locked-up programs and locate problem software If your notebook locks up or stops responding while using a program, close the stalled program to continue using other programs. Also, while closing the program, take note of which other programs are running at the same time.
  1. Close the program that is "Not responding" and determine if the lock-ups continue.
  2. If the lock-ups no longer occur after the program is closed, go to Uninstall and re-install the problem software .
  3. If the lockups continue, press ctrl + alt + delete to go back to the Task Manager.
  4. Write down all of the programs that are running when the lock-up occurs. The conflict could have originated by another software application that is running at the same time.
  5. Close other programs that are running one at a time (except for Explorer and Systray) and determine if the lockups continue. Once you find the problematic software application, go to Uninstall and re-install the problem software .
Uninstall and re-install the problem software To resolve the problem that is causing the notebook to lock-up, uninstall the suspected software and then re-install it. If your software came with an uninstaller program, use it first; otherwise, follow the steps below to uninstall and re-install the program.
  1. Click Start > Control Panel .
  2. When the Control Panel window opens, select Uninstall a program.
  3. Select the program that is causing the lockups and right-click it. Then select Uninstall . NOTE: Remove all versions of the same program. Sometimes upgrades will not remove old versions of the software before installing the new version. This leaves multiple versions of the same software on your computer.
  4. After removing the problem programs, close the Control Panel.
  5. Restart the computer.
  6. Re-install the program following the vendor's instructions

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