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Recover from an incorrect resolution setting on a mini Desktop Macs
Apple's Intel Mac Mini has only one display connection, the DVI interface. In case someone has chosen a wrong display resolution for a connected display, it is very difficult to switch back to a usable resolution.

When (for example) using a Benq LCD connected via a VGA to DVI adaptor to the Mac Mini and changing the frequency from 60Hz to 75Hz, the Mini will always remember the chosen resolution, even if a PRAM reset or complete hardware reset is done. So the screen still stays black, as 75Hz can't be shown although the Displays System Preferences pane offers this frequency. It doesn't matter if you are connecting another display to the interface and afterwards changing the resolution; the Mini keeps on switching back to the former one if the misbehaving display is re-connected.

In order to switch back to a usable resolution, you will have to remote control the Mini from another Mac using screen sharing, Apple Remote Desktop, VNC, or Timbuktu. Even though the Mini's screen will be black, the remote Mac will show a usable image. While remote-controlling the Mini, you have to change the resolution within the Displays System Preferences panel. After changing the resolution remotely, the display should jump back to a usable resolution.

[robg adds: Apple provides a potentially easier solution to the black screen problem: use safe boot mode. Thanks to queue user fds for pointing this out.]
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Recover from an incorrect resolution setting on a mini
Authored by: vadalus on Dec 18, '07 04:24:49AM

i actually was interested in doing the opposite. I have my mac mini connected to a plasma TV via VGA and if the plasma is not turned on when the mac comes out of sleep it 'resets' the display back to 800x600 (instead of the 720p friendly resolution). Now i can address this by 'detecting' the screen again, but usually i just use my remote control and FrontRow and don't even have a keyboard attached.

Any ideas how to do this with the remote or have the mac redetect the display periodically?



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Recover from an incorrect resolution setting on a mini
Authored by: bryguy on Dec 19, '07 06:11:39AM

If your plasma has an unused HDMI port, I'd suggest getting a DVI -> HDMI cable (I think cost me $10 on NewEgg). Automatically sets to the best/native resolution of your TV (mine happens to be 1080p even though the TV was advertised as only doing up to 1080i)



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Recover from an incorrect resolution setting on a mini
Authored by: robogobo on Dec 19, '07 01:00:31PM

Not sure that will fix the problem though, since allegedly the black screen will return when the problem monitor is attached again.



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