Light Tunnel Failure is usually caused by glue becoming brittle and fragile from the nearby hot lamp.
The most common symptom of a defective light tunnel is:
1. Shadow on one side of the image (Usually Left side)
Light
Tunnel Replacement requires removal and dis-assembly of the Optical
Engine. This is a complicated process and not recommended for in-
experienced technicians.
Light Tunnel replacement is available for all Samsung models.