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Message: <blockquote data-quote="Schmange" data-source="post: 1031459" data-attributes="member: 48207">This is so weird I don't have a clue what to do.I've got a G5 with a couple of 23" monitors.  Everything works great... I can leave the computer running for hours or even days and there's no problem.For instance, I can leave Safari running, go away for 2 days and come back and it's still running great.If I open up a movie on YouTube however, or run a screensaver... at some point, both monitors will suddenly go completely black (as in, completely shut off so that the white power lights come on).   The computer keeps running as if nothing has happened and the movie keeps running in the background.No matter what I do though, I can't get the monitors to come back on.  The only choice I have is to do a forced shut down using the power button.Then I have to wait at least 15 minutes before attempting to start back up again or the monitors still won't work.  Once I wait for 15 minutes, I'll start it up.... the right monitor comes on ok... then the left one stays black for about 10 minutes until it too finally comes on.  So.... what the heck do I do to diagnose this problem?</blockquote>

Verification: How many occurrences of a n-u-m-b-e-r between "d" and "f" in this example...(sdgs6ngklu3gd#f9%)?