G4 unstable

Discussion in 'PowerPC Macs' started by atc789, Oct 20, 2009.

  1. atc789 macrumors newbie

    Oct 20, 2009
    G4 running Leopard. Display becomes unstable shortly after startup. Windows either won't move or stay on screen after they are closed. Oddly it seems to be worse if the dock is placed at the bottom. The entire dock will never show up if it is on the bottom, but shows up fine on either side. I've cleaned out the case and run all hardware tests. I suspect the video card is failing. Any ideas?

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