...I had an RS20 fail in that same manner, while still under warranty. JVC replaced my unit with the same model, but then, after about a year the replacement projector failed in the exact same manner. Upon returning the unit and after several phone and e-mail discussions, JVC replaced the optical block on the second unit without charge, even though my warranty on the original unit had since expired. This was during the time of the horrific tsunami in Japan. They actually fabricated the replacement block back in Japan by special order. During discussions, the second round, I had a chance to ask the tech who worked on replacing the block about the vertical line problem history, and was told that the original RS20 series used a type of assembly glue somewhere in the optical block that had a history of letting go. The symptom of this failure is a vertical line of discoloration on screen right extreme edge, or screen left if inverted ceiling mounted, that slowly widens with time. Their fix on later models (probably the RS25 series and forward) was presumably a change in the type of glue being used and glue-up procedure, during the factory optical block assembly. The conclusions drawn from this experience is, first, strong kudos to JVC for the extraordinary customer service extended to me, and, secondly, the chances of the same vertical edge discoloration problem popping up on the later models should be tiny..
Are Eleven Channels Really Enough?