It just shows the viewsonic logic and at the bottom it indicates it is searching
It is not the first time. I turned on the computer and then connected the projector. I also turned on the projector first and then connected the projector. Either way I only get the viewsonic image.
None of those steps worked. It is either a software problem or a connector problem. The projector works with a desktop running OSX 10.4.1
The disk is ok and does not need repair.
I am not sure why it is necessary to run Onyx if the disk is ok and what will it do for the system.