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Thread: Asrock z77 extreme4 - Dr debug A6




  1. #1
    6TealeaF9 is offline Junior Member
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    Angry Asrock z77 extreme4 - Dr debug A6

    Hello everyone,

    Here is my problem. My pc doesn't boot and is stuck in Dr. Debug A6.

    It happened without warning. I just did a "reboot" and then nothing, I cannot access the BIOS, I just have a black screen.
    According to the manual, 0xA6 = SCSI Detect, good but it does not say what to do for this kind of problem.

    Tests done:
    -Clear CMOS => KO
    -remove graphic cards => KO
    -unplug unnecessary SATA (just SSD) => KO
    -remove a RAM module => KO
    -remove and refit the RAM module (inter-change) => KO
    -changing USB devices (keyboard and mouse) => KO
    -re-clear CMOS => KO

    Tests to do:
    -Flashing the BIOS
    -All-disassemble and reassemble
    - ...

    For a year and a half, everything was fine. I do not understand.

    Thank you in advance for your lights

  2. #2
    6TealeaF9 is offline Junior Member
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    Default Re: Asrock z77 extreme4 - Dr debug A6

    Now it changed to A2 IDE Detect...



    Edit: Is the problem from the CPU or the MB?
    Last edited by 6TealeaF9; 06-11-2014 at 08:36 PM.

  3. #3
    parsec's Avatar
    parsec is offline Senior Member
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    Default Re: Asrock z77 extreme4 - Dr debug A6

    A2 and A6 are both related to HDD/SSD problems. No idea what other drives you have in the PC, but one may have failed.

    If you disconnect the power cable from one drive at a time, you may find a bad drive.

    A much more rare problem would be a failure of the SATA interface itself, but that would likely be noticed in an earlier POST check.

  4. #4
    6TealeaF9 is offline Junior Member
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    Post Re: Asrock z77 extreme4 - Dr debug A6/A2

    Thanks for your analyse parsec,

    What I did:

    -Unplugged all the component and left only CPU+Rad, one memory.
    -That time I could go into the BIOS.
    -Flashed with the latest version
    -Add component by component to see if one of them was faulty (checking all the plugs)

    I cannot figure out what happened but it was a mess and now it works fine.

    Thanks again.

    Topic solved

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