Power Macintosh 4400: Black Screen & Video Mirroring (11/96)

I am using video mirroring with my Macintosh Performa 4400. However, whenever I restart or shut down the computer, both monitors appear black or gray when the computer starts up again. How can I prevent this from happening?


This appears to be an issue with the system software on the Power Macintosh 4400. Apple plans on resolving this issue in a future version of the Mac OS. In the interim, you can use one of the following workarounds.

* If you no longer want to use video mirroring, follow these steps:

Step 1
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Shut down the computer.

Step 2
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Unplug the monitor cable that is connected to the PCI video card.

Step 3
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Restart the computer.



* Or, if you still want to use video mirroring after restarting, follow these steps:

Step 1
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Before shutting down or restarting the computer, open the Monitors & Sound control panel.

Step 2
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Turn off Video Mirroring in the Monitors & Sound control panel.

Step 3
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Restart or shut down your computer.

Step 4
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Once the computer has restarted, turn Video Mirroring back on in the Monitors & Sound control panel.

Published Date: Feb 18, 2012