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nigelw2749
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Q: My Mac Book Pro wont start up as it powers down then comes back on with a grey screen for 5 seconds then keeps doing this, can someone help?

Hi

 

My Mac Book Pro wont boot up on start up, when i power it up it has a grey screen with the apple logo, after 5 seconds it shuts down then powers back up and keeps doing the same!

Can someone give me any advice on how to solve this problem?

 

Regards

 

Nigel

MacBook Pro, OS X Mavericks (10.9.1)

Posted on Jan 24, 2014 11:14 AM

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nigelw2749

Q: My Mac Book Pro wont start up as it powers down then comes back on with a grey screen for 5 seconds then keeps doing this, can som ... more

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  • by Barney-15E,

    Barney-15E Barney-15E Jan 24, 2014 4:39 PM in response to nigelw2749
    Level 9 (50,876 points)
    Mac OS X
    Jan 24, 2014 4:39 PM in response to nigelw2749

    Hold down Cmd-r and see if it boots. If it does, it will be in Recovery. Select the First Aid tab and the Hard drive. Then, click Repair disk. If it finds errors but corrects them, run repair again.

     

    Reboot and see if it works.

     

    If that doesn't work, try booting into Safe Mode by holding down the shift key. If you have FileVault enabled, you can't boot into Safe Mode, so I'm not sure what else to do at this point.

  • by nigelw2749,

    nigelw2749 nigelw2749 Jan 25, 2014 5:31 AM in response to Barney-15E
    Level 1 (0 points)
    Jan 25, 2014 5:31 AM in response to Barney-15E

    Thanks Barney

     

    I tried to boot up with Cmd-R but i have to hold them keys through the whole process, if i let go of the keys it turns off! It dislays repair disk in the first aid after ive verified disk but when i do this it comes up with reformat disk and back up files but I dont know how to do this? Please help

     

    Many thanks

  • by Barney-15E,

    Barney-15E Barney-15E Jan 25, 2014 6:17 AM in response to nigelw2749
    Level 9 (50,876 points)
    Mac OS X
    Jan 25, 2014 6:17 AM in response to nigelw2749

    It sounds like your hard drive is failing or has failed. It cannot repair the disk and is suggesting you back up and format the drive. Do you already have a backup?

     

    A couple of things to try first:

    NVRAM reset: http://support.apple.com/kb/HT1379

    SMC reset: http://support.apple.com/kb/ht3964

  • by nigelw2749,

    nigelw2749 nigelw2749 Jan 30, 2014 6:13 AM in response to Barney-15E
    Level 1 (0 points)
    Jan 30, 2014 6:13 AM in response to Barney-15E

    Thanks for helping me ... but i nothing  soomes to work as i keeps powering down every time i try so i will have to send it in for a repair job!

     

    Many thanks