mstrstewart

yes, we had that similar issue too, but are now moving to mostly just usb to doc cams and duplicating pc to projector, with exceptions of teachers that want to have switching capability some of the doc cams have or dual monitors in which it is extended and duplicated. The above issue is set up PC<-VGA->Doc Cam<-VGA->projector, though PC<-VGA->projector is the same

It is connected via VGA on both ends. I also had it connected to a doc cam directly which works fine from that source, but the passthrough from the pc has the same issue as above desktop is duplicated displays

An issue that seems to be recurring this year is dim projectors. At first, we thought it was probably due to lamp life. However, I discovered that the desktop, file explorer, and doc cam software would all be projected with no dimness. When chrome or IE was open, however, the bottom half of the projected image would be almost black while the top would still be pretty dim too, but readable. If I closed the browser, the issue went away. The projector plugged into a Chromebook had no issues. I feel that the issue has more to do with the PC, a Dell Optiplex 3030 running Windows 10 v1809 enterprise. The PC was updated, and then reimaged this summer Thanks for any feedback!