I seem to remember that Computer Shopper magazine tested this projector a few months back and had the same problem.
Unfortunately, they were unable to find an answer and had to accept the fact that it just doesn't work.
Surface Pro (2017) vs Surface Pro 4
Where HTML5 is headed next
MacBook Pro v Surface Pro 5
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.