Projector Benq Image Problem Looks Like Shadow Benq W600 Projector

Chosen Solution

Hi, my projector BENQ (Texas Instruments) W600+ has a minor image problem. It looks like a shaddow in the left border (16:9). See image.

Any idea, what’s wrong? Stig

Update I disassebmled the projector and readjusted the light tunnel. Now it’s much better. Only on the left side the image is a little (minimal) darker.