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 whether 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 that frequency. It doesn’t matter whether you are connecting another display to the interface and afterwards changing the resolution; the Mini keeps on switching back to the former one whether 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…

Original post by Michael Rose