Mackook Pro 5.1 Keeps sleeping ever 4 seconds

Discussion in 'MacBook Pro' started by PHinett, Feb 6, 2011.

  1. PHinett macrumors newbie

    Joined:
    Feb 6, 2011
    #1
    Hi,

    I am having a problem with my macbook pro laptop which has been working fine for around 12 months.

    It's the late 2008 unibody version, 5.1 i think.

    I have OSX 10.5 and windows 7 installed which were working fine until today, now both windows & osx keep going into sleep mode after several seconds...as soon as i bring it back out of sleep after a few seconds it sleeps again.

    This made me beleive it was maybe a hardware issue, maybe overheating or something.

    But the wierd thing is that I can get into safe mode on Windows and it works perfectly fine...which is what I am on now.

    I tried some software (SpeedFan) to read my temperatures but it wont work in safe mode unfortunately.

    Anyone got any ideas what this could be?

    I have tried the following with no luck:
    - Removing the battery and just running on the plug
    - Resetted NVRAV / PRAM (not entirely sure if it reset though, no message appeared or anything)
    - Let the laptop cool down for 30 mins before trying again.
    - Booting into OSX safe mode, same sleep cycle happened

    Thank You!
    Paul
     
  2. McGiord macrumors 601

    McGiord

    Joined:
    Oct 5, 2003
    Location:
    Dark Castle
    #2
    try power off, remove battery, depress on button for 30 seconds
     
  3. PHinett thread starter macrumors newbie

    Joined:
    Feb 6, 2011
    #3
    Tried that didnt work.

    Wasn't sure if i needed to remove the power cord too, but i tried with and without and holding the power button for 30 seconds then booting again.

    Just got the same issue.
     
  4. McGiord macrumors 601

    McGiord

    Joined:
    Oct 5, 2003
    Location:
    Dark Castle
    #4
    try creating a new user, and boot with that new user and see if the issue remains, if it does then it might be a hardware issue.
    For that you might need to run the hardware diagnostics from apple.
     
  5. McGiord macrumors 601

    McGiord

    Joined:
    Oct 5, 2003
    Location:
    Dark Castle
  6. PHinett thread starter macrumors newbie

    Joined:
    Feb 6, 2011
    #6
    I tried creating a new user in Windows 7 safe mode but still get the same result.

    I can't get into OSX at all so can't install them apps.

    I can only get into Windows safe mode.
     
  7. Dark Dragoon macrumors 6502a

    Dark Dragoon

    Joined:
    Jul 28, 2006
    Location:
    UK
    #7
    It sounds like the sensor that detects whether the lid is closed has failed.

    On Windows in the power preferences I think you can change what closing the lid does, if you change it to do nothing, then reboot into Windows normally does the sleep cycle stop?
     

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