Thank u all for taking the initiative to help.
The model is HS51, not 51A. Here are the connections I have tried so far:
-- From Bose Receiver using S-Video to the Projector. I never even get the picture.
-- From Bose Receiver using a composite video cable to the Projector. I get the picture, but its in black and white.
-- From a DVD Player using component video cable to the projector. Same as above, picture is black and white only.
For all the above attempts, I set the "Input" option in the projector menu to be 'Auto'.
Here are some of the things that I plan to do tomorrow (as suggested):
-- Check to make sure that those cables are working fine by connecting to another source and verifying they are ok. These have been used before, but want to rule out them as a cause.
-- Get another DVD player as a source and see if that makes any difference.
-- See if using HDMI cable makes any difference. Have to buy that now.
I will post the results after my tests. But you guys can think of anything else, please post them here.
I got an question about the menu in the projector. When I try to select the source of the signal, if I remember correctly, I see only four options (Auto, Computer, Component, Video RGB or something like that). Why are there only these options, when I have other inputs like HDMI in the back of the unit? Does Auto cover all of them?