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    iMac 27″ Mid-2011 | Booting loop and Green lines | Genius Diagnostic

    by crogj ·


    This iMac was donated to me by my father, and I’m determined to repair and upgrade it. COVID has ruined my offline business so, I’m now pointing in a different direction. This iMac needs to be used for web design and other such activities. I already have a MacBook Air 2017, which could aid in the restoration of the iMac.

    What I would like to do is, top up the RAM, upgrade to SSD, upgrade video card and CPU. Any other suggestions would be greatly appreciated.

    I have little experience with repairing computers, although I’m fairly competent when it comes to following technical instruction. If there are any here that would be willing to give me some advice, as to what steps I need to take, I’d be very grateful.

    Here are the results of the ‘Apple genius bar’ diagnostic test and Technician’s notes.

    Problem Description/Diagnosis

    Issue: iMac is booting with Apple logo and then restarting after loading bar and just loops, also there are vertical green lines

    Steps to Reproduce: Verified issues

    Managed to run video test which passed

    Also MRI all passed

    Storage diagnostics failed to run

    Attempted twice

    Loads to grey screen

    Cosmetic Condition: NA

    Proposed Resolution: Positioned as Mac is an obsolete model unable to repair any hardware

    Potentially could have iMac plugged into external monitor to bypass green lines

    Could attempt a clean restore if OS or create a external bootable version of OS

    New hard drive might be needed, worse case scenario logic board

    Resolution: Service Denied

    Reason: Desired Repair Type Unavailable

    Hard Drive Size: 1000

    Memory Size: 4096

    Contact Apple Support Case: 101128510720

    Thank you for reading.


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