Hard disk problem with MBP 13 unibody

Discussion in 'MacBook Pro' started by HenryBahus, Feb 25, 2011.

  1. HenryBahus macrumors newbie

    Feb 25, 2011
    Hi everyone!
    16 months ago I bought MacBookPro 13.3" and upgraded the hard disk to a Scorpio Black 7200 rpm 320Gb.

    Two days ago I had troubles:

    MBP very slow, so I restarted the system and when started up: no hard disk found.
    I suddenly thought: "Hard disk gone", in fact booting from CDROm and using Utility Disk I figured out that no sata hard disk was detected.

    So I removed the hard disk and using some softwares I checked that the hard disk was perfect (logical and physical): all my files were ok!
    Re tried in mac and it worked again: the system recognised again the hard disk. But it was again slow and after a restart happend the same before.

    AT THE MOMENT the problem is: the MPB doesnt recognize ANY sata hard disk (I tried connecting another!);

    Now I'm using my mac booting from usb cause I've connected the hdd were mac os x was in, but it still doesnt recognise any hard disk connected to the sata cable!
    In System profiler under SATA section I see two NVIDIA MCP79 AHCI:
    one detect DVD-ROM reader,
    but the second one, where now I've plugged the second hard drive (that is perfectly working!) there is nothing: no trace of the sata hard disk.

    I dont really know what's wrong!
    I Bought a new cable (the one that connect the hard disk to the main board) from ifixit,hoping that could be the solution, and I'm waiting it arrives, but I dubt this could be the solution because the hard drive that is now connected is on (I can hear the disks spinning!) and I think that if the cable is broken the hard disk would not be turned on. Idk!

    Help me please!

    Sorry guys for my english:rolleyes:
  2. oakie macrumors 6502


    Oct 16, 2008
    well, if a new cable doesnt fix it then it's obviously an issue with the SATA controller, which is not user replaceable, requiring a trip to an apple repair specialist in your country.
  3. HenryBahus thread starter macrumors newbie

    Feb 25, 2011
    I know, but the weird thing is that the MBP after the first troubles recognised for a while the hard disk: I used it!

    Thank you for ur answer oakie
  4. oakie macrumors 6502


    Oct 16, 2008
    probably a bad solder point somewhere that is now finally revealing itself after being heatcycled repeatedly or a weak point in the cable itself that is now revealing itself after being handled during the drive replacement.
  5. Dadioh macrumors 65816


    Feb 3, 2010
    Canada Eh?
    It is a flex cable so it contains multiple signals. It could still provide power to the disk but have an intermittent data signal. A slight flexing of the cable and it makes or breaks contact. Hopefully it is the cable because otherwise you are looking at logic board replacement which is not cheap.
  6. HenryBahus thread starter macrumors newbie

    Feb 25, 2011
    Problem solved!

    Cable replaced and everything's perfect!

    Thank you guys for yuor support!

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