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  1. #1

    Member Since
    Dec 29, 2010
    PowerPC G5 Freeze with Pattern
    I have an iMac G5 1.8 GHz powerpc that freezes and displays a pattern of horizontal and vertical lines over the entire screen. Just upgraded to Leopard few months ago. What could be causing this? Thanks.

  2. #2

    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Nambucca Heads Australia
    iMac i5 2.7GHz, 16GB memory, OS 10.11.1.
    G'day and welcome to the forums, pity under such circumstances.

    Indications are failing logic board and here is a similar post from Apple Discussions, same problem same model iMac:-
    Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!

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