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Message: <blockquote data-quote="Harpua" data-source="post: 1614205" data-attributes="member: 335967">Greetings.  I am a new member to this forum, though I have read many posts over the years.I have a dual monitor setup on my iMac (2009) running Snow Leopard (10.6.8).  The iMac monitor (21") had been working great, but now it goes to a black screen when I boot up.  I am able to access it briefly (for about a second) by lightly pressing the power button on the back.  The iMac monitor flashes on briefly when I do this and I'm able to quickly click on user.  I used this same method to open Settings and drag it over to the 2nd monitor to change the display setting to Mirror mode, so I'd have access to the dock on the 2nd monitor (Dell 2007WFP). I have tried the following so far:     checked cables     booted in Safe Mode     reset SMC     reset PRAM (I believe this was reset, but I don't know for sure because I couldn't see anything on the monitors.)  Other information:     2.66 GHz Intel Core 2 Duo     8 GB 1067 MHz DDR3     NVIDIA GeForce 9400Thank you in advance for any help with this problem!</blockquote>

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