Computer won't wake from sleep; shuts-down unexpectedly

I've got older PB (2004). This just started happening. The computer will not wake from sleep, either when I close the screen or manually put it to sleep. I have reset the PRAM and PMU, but no change. Further, it now shuts itself down unexpectedly. Sometimes a hear the fan going hard before it shuts down, other times it just shuts down. It won't turn back on unless I reset the PMU. I think the battery and the cable are fine. I don't have anything plugged into the computer when it does this (other than power cable). Any suggestions?

Hello Matt,
This is just to let you know that I have had the same thing happen to me this week and that I plan to closely follow your thread so that hopefully I may benefit from your responses. I, too, am using an older Powerbook (15", 1.33 MHz) and OS 10.3.9.
My problem began several days ago when I set up my first wireless router. Once it was up and running I set out to re-locate the router to the farthest point in my house. While traveling back and forth between the router and my laptop, I suddenly found that my laptop was totally blank and unresponsive (although the power light was on). I could not make it shut off, or start up. Using a second computer I turned to this support site, and by the end of the day I had learned enough to remove the battery over night while the reserve unit charged. The next morning I was able to reset the PMU and as a result I found that I could use the computer. ( I also decided to order a new battery, which is on its way as I write. I realize that it may or may not help). At present I am able to start the laptop by resetting the PMU, and while it is on everything seems fine. However, if I close the case, or put it into sleep mode, it dies immediately. (I am able to use the PMU to restart.)
If you determine what caused your laptop to malfunction I hope that you will post it here for my education...and I will do the same. Thank you. Gferg

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    I have taken to Genius Bar twice to no avail.  They could duplicate the problem the first time I had it in and ran some type of software repair.  Didn't permanently fix issue.  Second trip they tech thought it might be one of the two internal sleep switches.  She ordered them but when they ran diagonsics on those switches, the said they were good and didn't replace or repair anything.
    I have replaced both HDD and RAM and reinstalled 10.8 but problem continues.  Any suggestions?

    Not sure if this will help--but my MacBook was having similar problems. It would fall asleep and then when I would try to wake the computer, the screen would stay black but the computer was running.
    Here is what I tried:
    Turn of your mac
    Press the power on button
    Immediately after you press the power on button: hold down the following 4 keys:
    Command + Option + P + R. Continue to hold them down until you hear your mac make the power on sound twice. Once you hear it twice, let go of all keys.
    This should re-set the sleep settings. Worked for my computer, I hope it works for you if you haven't already tried it.

  • Suddenly won't wake from sleep.

    All was well but suddenly the Powermac G4 (gigabit ethernet) won't wake from sleep. Tried resetting the PMU (battery out and button pushed). Tried resetting the PRAM. Tried deleting the energy preference file. Even tried installing 10.5 on this old baby (runs just a slowly as ever, but startup takes an age). Can't run hardware testing because there's a bad firewire on the motherboard and it just stops there. Don't know what else to do. Why? this is my music server and it uses just as much power as my refrigerator if left running all the time but only needs to run when playing music.
    400MHz PowerPC G4 (2.9)
    boot rom 4.28f1
    two Maxtor ATA drives
    Studio Display with DVIator power and adapter
    1G RAM (sure, I'd like more)
    one PCI card with FW and 2 USB
    one PCI card with 4 USB
    Airport card
    Modem
    System Power Settings:
    System Sleep Timer: 60
    Disk Sleep Timer: 10
    Display Sleep Timer: 10
    Sleep on Power Button: No
    Automatic Restart on Power Loss: No
    Wake on AC change: No
    Wake on Clamshell Open: Yes
    Wake on LAN: Yes (does not respond)
    Wake on Modem Ring: Yes

    If the SMC reset doesn't work try this.....
    If your Mac happily goes to sleep but won't wake up--Hold down the power switch to force-reboot your machine and get it running again.
    Don't worry-your Mac isn't narcoleptic. Its Open Firmware system or NVRAM (nonvolatile RAM) is likely corrupt, and your Mac can't remember how to wake up.
    Try resetting the PRAM. This should reset the NVRAM on most machines, which is the suggested fix.
    Then put it back to sleep to test. If the problem recurs your Energy Saver preferences may be the culprit. Delete the com.apple.PowerManagement.plist file (go to Finder/Hard drive/Library/Preferences/SystemConfiguration)--don't worry, your Mac will regenerate a new one--and then restart to see if that rights the wrong. The restart is very important.
     Good Luck! DALE

  • Macbook Pro with Leopard Won't Wake from Sleep

    I'm intermittently, but with increased frequency finding my MBP won't wake from sleep. A copy of my log is below. I've snipped out where the log repeats. A common message is the "unknown SIGSEGV code 0". Any ideas what the issue is? How can I go about diagnosing?
    9/1/10 2:40:11 PM [0x0-0x1a01a].com.adobe.flash-10.0[269] got type name: Object
    9/1/10 2:40:11 PM [0x0-0x1a01a].com.adobe.flash-10.0[269] got type name: Object
    9/1/10 2:40:11 PM [0x0-0x1a01a].com.adobe.flash-10.0[269] got type name: Object
    9/1/10 2:40:11 PM [0x0-0x1a01a].com.adobe.flash-10.0[269] function findRecords(table:Object,findField:Object,findValue:Object,)
    9/1/10 2:40:12 PM [0x0-0x1a01a].com.adobe.flash-10.0[269] CFlashPlayerMDIFrame::LoadFrame
    9/1/10 2:40:24 PM kernel unknown SIGSEGV code 0
    <SNIP>
    9/1/10 3:14:24 PM kernel unknown SIGSEGV code 0
    9/1/10 3:14:34 PM Safari[165] * _NSAutoreleaseNoPool(): Object 0x1acad280 of class NSCFString autoreleased with no pool in place - just leaking
    Stack: (0x96632f4f 0x9653f432 0x9654d038 0x2d112ea2 0x2d02a511 0x2d04383d 0x2d04386b 0x968a3155 0x968a3012)
    <SNIP>
    9/1/10 3:14:34 PM Safari[165] * _NSAutoreleaseNoPool(): Object 0x1919b1f0 of class NSCFString autoreleased with no pool in place - just leaking
    Stack: (0x96632f4f 0x9653f432 0x966c30c2 0x2d001a20 0x2d027e67 0x2d02a525 0x2d04383d 0x2d04386b 0x968a3155 0x968a3012)
    9/1/10 3:14:44 PM kernel unknown SIGSEGV code 0
    <SNIP>
    9/2/10 5:06:22 AM kernel npvhash=4095
    9/2/10 5:06:17 AM com.apple.launchctl.System[2] kern.ipc.maxsockbuf: 8388608 -> 512000

    Hi David,
    - Have you tried any troubleshooting steps?
    You may try the following steps:
    1. Reset SMC as per the following article http://support.apple.com/kb/HT3964?viewlocale=en_US. If this does not resolve the issue then go to step 2.
    2. Navigate to Macintosh HD/Library/Preferences/System Configuration and remove a file called powermanagement.plist (drag it to trash, might prompt for a password). Restart the mac thereafter. If this does not resolve the issue, boot to safe mode as per http://support.apple.com/kb/ht1455 and check the issue there. If it works there, you will have to remove the following files to check Macintosh HD/Library/StartupItems, HD/Library/Caches and then restart the mac.
    Let me know if this works.

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