BenQ 8700

I had a similar problem with my Benq 8700+. The aspect ratio would show in the R low corner on changinbg resolutions, and would close down to a single line ("anamorphic" for example) which would remain on the screen. I checked the manual (useless) and went through all the set up screens (again useless). In despiration, I decided to try to unplug the projector and did so for 30 seconds to allow the charge to drain from the circuits powering the chips in the 8700+. Upon returning power and restarting, the screen resolution appears/disappears properly once again. Give thjis a try.