The first time my Mac Pro booted after this procedure, only 4GB of RAM was recognised by the system. Removing the HDDs, RAM cards, PCI cards and cables may or may not affect your situation. press the Power button to boot up the Mac Pro.let the Mac Pro sit idle for 12 to 24 hours.press the Power button for 5 seconds to drain any residual power from the system.removing every HDD, RAM card, PCI card and cable does not correct the situation.Īssuming that the Mac Pro is not powered up:.replacing the PRAM battery does not necessarily correct the situation.resetting the system via the reset button on the mother board does not affect the situation.(the startup sequence does not proceed far enough to allow this to happen.) Several seconds after pressing the Power button to start up the Mac Pro, it shuts itself down. the LED indicators on the RAM cards all light up red. the graphics card fan runs at full speed.While asleep, or shut down, I press the Power button to start up the Mac Pro leading to the following events: Within the last 6 months, a situation with the Mac Pro has occurred twice.
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