I have been reading the archive for a while now, and I've got to say I've learnt more about projectors from this site that anywhere else including the service manuals!
I do have a few questions that I cant find answers too, perhaps someone can help.
I have a Marquee 8000 with an apparently dead green tube.
1. When I power up all works fine bar the green, I can get crosshatch patterns up and change contrast etc which shows up as a bar with numbers when I do.
However when I go into the menu system the display shows a square (mainly in the blue tube) framing the menu but there is no text.
Is this because the text is in green and without a green tube it wont show up? Or are the menu texts in white and I have some bizarre problem.
2. I do have a spare tube, although I'm not sure it works and itâ€™s the wrong colour.
Is it safe to install the wrong colour tube in the green position so I can test the electrics and or the spare tube?
Will the wrong colour tube work as if it was green in so far as not damaging any other components etc, i.e. all except obviously it will project in the wrong colour?
3. The green tubes cathode does glow a healthy orange but there is no screen response at all, the HT (big red wire) is delivering voltage also. Could there be a neck board problem or can busted tubes still glow orange normally.
4. And finally with 1 tube non functional is running the projector likely to cause any damage?
Any Ideas gratefully received.