Hello Elkhan,
This issue may be caused by the way the projector was mounted on the stand. The best test for this is to put the projector on a flat surface and see if the image is displayed properly. If you are still having issues, please contact Technical Support via the web form on the knowledge base at www.prometheankb.com, select your region/language, Projectors, Contact Us. In the Existing case field input case number: 281883.
Thank you!