okay, i have an acer xd1150 projector. Not the greatest i know, but it should be able to scale up to 1080i. I have the computer hooked up via VGA, and all resolutions except 720p and 1080i display with the right colors. When I try to display 720p or 1080i the entire screen gets a very noticable green tint. I dont have any other HD sources to test with. the dvd player i have is 480p only. Am I doing something wrong? how can I correct the green?

HD signals use a different color space. Usually with analog, the color space should be RGB but some devices will change to YCbCr because it sees the HD resolution. Check your player and your PJ for the color space setting and change it to get rid of the green sheen.

forgive my ignorance, but i cant seem to find a way to change this. My player is a pc, running windows. I looked in the projector manual, as well as through the menus, and i cant seem to find anything. Is there a way to change it on the PC side?

Ok, I checked the user manual and it looks like the vga port is compatible with several color spaces but I don't find a manual setting for it.

Are you trying to play a dvd on your pc and then send it out as 1280x720 or 1920x1080?
Your PJ is a native 800x600 PJ so why scale your signal to anything else?

What are you trying to display from the PC and what software player are you using to do this?

ffdshow (http://sourceforge.net/projects/ffdshow) will give you more options as a player for a number of settings including color space.

Almost all video signals use some variant of YUV. Component and HDMI CAN use RGB, but component in particular does not. And of course, VGA is RGB.

Ok, I checked the user manual and it looks like the vga port is compatible with several color spaces but I don't find a manual setting for it.

Are you trying to play a dvd on your pc and then send it out as 1280x720 or 1920x1080?
Your PJ is a native 800x600 PJ so why scale your signal to anything else?

What are you trying to display from the PC and what software player are you using to do this?

ffdshow (http://sourceforge.net/projects/ffdshow) will give you more options as a player for a number of settings including color space.

I was just playing around with it, so yes, i was trying to scale a dvd to 1280x720. Just found it odd that it gave it a green tint. I usually use windows media player or divx player to display movies. So if im playing from PC, 800x600 should weild the best picture, since thats the native resolution, correct?

If i add an HD source in the future, such as dish or an hd-dvd/blu ray player..will i have the green tint issue, or does that come from the pc source?

I'm still not confident where the green tint is coming from since you are running VGa to your PJ so it should be RGB and since it only happens when you try to upscale the image to 1280x720.

Ordinarily, I say the PJ needs to be told what color space to use since it is showing green but the user guide did not show a way to set it manually. I would have also said you have the a loose red component wire but you are using vga so that isn't it.

So, even though the PJ is compatible with several resultions and color tables, something being sent by the PC at that is not quite right.

Are you posting in the HTPC forum?

i havent posted over in that forum, should i look there?

I also have a progressive scan dvd player outputting 480p via a component to vga cable, and 480p displays great. It only seems to do it on 720p and 1080i, and like i said, i only have the pc to work with right now. its very odd, but ill go ahead and look over to the htpc folks to see if they have any more ideas...if i get it fixed ill let you know