You have a short on the data communication line within the set. Unfortunately that can be on almost any board. Without swapping boards, you can't really tell.
I have most boards for sale for $10 each in tested working shape.
You can pull the convergence board out from under the lenses and see if the problem goes away. That's the only board you can pull though without losing the image. You'll lose convergence functions, but you'll be able to see if the error message goes away. Instead, you'll get a bunch of specific I2R location errors, which refer to the convergence board.
thanks for the replay curt.
i started the barco up with the tray under the lenses removed but the error was still the same.
you are right it could be a bunch of cards (every card on the i2c bus).
I still have another working barco data 800, so i can swap the cards one by one but i'm afraid that the broken barco will kill a working card from my good barco.
If one day i start swapping cards and i locate the broken card then i will give your $10 cards a thought
probably helpful to keep in mind that you would have to literally pay someone to haul those things way at this point, so really not necessary to worry about causing further damage. So swap the boards until you find the faulty one
People are giving away much better and more capable sets