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Mac pro gray screen with messege when turn on

164 Views 1 Reply Latest reply: Feb 4, 2013 8:42 AM by Grant Bennet-Alder RSS
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Feb 4, 2013 5:37 AM

I turned on the Mac Pro. When loading, it stops. A gray screen comes up with a message to power off and turn on again. I do this, and the same thing happens. Any suggestions of troubleshooting methods?

Mac Pro, Mac OS X (10.6.8)

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