MBP won't boot (Prohibitory sign) HELP!

Discussion in 'Mac Basics and Help' started by jgw1283, Jul 8, 2012.

  1. jgw1283 macrumors regular

    jgw1283

    Joined:
    Aug 6, 2007
    Location:
    Tempe, AZ
    #1
    Just yesterday my 2008 MBP gave me the prohibitory sign upon restarting. I have been using some external USB HDDs lately but haven't deleted any system files or whatnot. To make a long story short, I've tried resetting the PRAM, booting in safe mode (where I'm writing this from) and using Disk Utility to repair permissions and check the disk. I also verified the HD and it said it was fine.

    I have NOT yet tried re-installing from my Snow Leopard DVD. If I do this, I just want to make sure it won't delete anything because I haven't used Time Machine in a while so I really can't afford to lose any data. What system files could possibly be fixed by re-installing the OS?

    Lastly, what do I do if this step doesn't work? I don't think my HDD is going bad. I haven't ever dropped it or abused it in any way over its life. Thanks much for any info/advice! :D
     
  2. jgw1283 thread starter macrumors regular

    jgw1283

    Joined:
    Aug 6, 2007
    Location:
    Tempe, AZ
  3. chibiterasu macrumors 6502

    chibiterasu

    Joined:
    Apr 5, 2012
    Location:
    London, The United Kingdom
    #3

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