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imac 20" 2.1ghz g5 wont dual screen
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Fresh-Faced Recruit
Join Date: Jun 2008
Location: Netherlands
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Hi, it's been a while since I first mentioned this odd malfunction of my iMac g5.
hardware
iMac g5 2.1ghz 20" with damaged screen because someone cut it up ( here is proof, it was a bargain)
samsung syncmaster 205bw by vga-mini
OSX 4.11
Suddenly it lost dual screen capability. All it can do right now is mirror to my external 20" samsung lcd.
this is how the display prefs look like :
I need the dual screen functionality, this iMacs was reinstalled with the original disks but it didn't help.
is it possible to install AppleScript firmware updater from Klaus Rutemölle ? It was ment for ibooks that had no dual screen capability. I don't want to destroy my imac but do like dual screen. Thank you. 
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" Introducing iMacs to the developing world"
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Moderator  Join Date: Oct 2001
Location: San Jose, CA
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This may be an obvious question, but have you checked the Displays preferences on the Arrange tab to disable mirroring?
Steve
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Celebrating 10 years and 4000 posts on MacNN!
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Moderator  Join Date: Apr 2005
Location: Cambridge, UK
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Try resetting the pram by holding cmd + option + p + r after the boot chime. Do this until it chimes for 2 more times, then let it boot up and see if the problem is fixed.
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Mac Elite
Join Date: Dec 2000
Location: Netherlands
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Originally Posted by ibook_steve 
This may be an obvious question, but have you checked the Displays preferences on the Arrange tab to disable mirroring?..
hi Steve, please notice that the "turn mirroring on/off"-option (or how it's called) is not in the screenshot either, it should be right below "detect displays". Which is just abnormal as he has obviously two screens in this setup.
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{Animated sigs are not allowed.}
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Join Date: Jul 2007
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I didn't think the G5 iMacs could do dual desktop- only mirror. I thought it wasn't until the intel iMacs that dual desktop was standard... I think there's a program (screen span doctor, or something like that) that'll let you span on a G5.
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Posting Junkie
Join Date: Nov 2000
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Exactly. Out of the box the iMac G5 can only mirror
The Intel Macs with their miniDVI were the first iMacs to support spanning out of the box. As the above poster pointed out, you will need Screen Spanning Doctor to enable spanning on your iMac.
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Mac Elite
Join Date: Dec 2000
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Wow, I didn't know that ! I thought they could
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Posting Junkie
Join Date: Nov 2000
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Well, in principle they can - the GPU, the port, and the OS all support it. It's just that Apple disabled the feature in OF. SSD will allow you to enable it again.
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Fresh-Faced Recruit
Join Date: Jun 2008
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Thanks people, I totally forgot I ever installed Screenspanningdoctor. THX !!! 
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" Introducing iMacs to the developing world"
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