I'm finishing a setup of a Linux HTPC with on-board graphics (ASRock H77M motherboard), and trying to figure out the best way to connect it to the CRT projector.
The backup projector currently in use is a Sony 1040Q with Composite video or RGB (5-channel) inputs. The main projector (in need of repair and reassembly) is a Barco 708s with Component (3-channel RGB) inputs. The computer has DVI-D, HDMI, and VGA outputs.
I thought it would be easy enough to run a VGA to Composite cable for the Sony projector, but I didn't realize that needs TV OUT capability on the graphics card in order for the signal to be compatible... It just produces a black screen as-is. So, unless I were to get a separate graphics card with that capability, it looks like that cable won't work (different color space).
If I'm not mistaken, the DVI-D out isn't of much use here, since it's only sending the digital signal (as opposed to DVI-I which has both) and would have to be converted.
So, I'm thinking I should go with something like this:
The reviews for those and similar products all refer from going to Component to VGA (i.e., from a DVD player to a monitor) and green tint issues that sometimes result, but I don't see any reason why it can't be used to go from VGA to Component. That would be the same color space, correct? I already have a long length of Canare Component cable in place with male ends, so all I need is the short adapter.
There are also VGA to Component/VGA splitters available on eBay that would preserve some flexibility for also running a monitor when using the HTPC as just a computer (not wanting to fire up the projector and turn sideways to view what you're typing) ... does splitting the signal like that have any negative effects on video quality?
For present use (Sony), I would hopefully be able to get it working with the Audio Authority Component (3-channel) to RGB (5-channel) converter box I already have in place. I never could figure out if the box or the projector's RGB inputs are the issue, so it's been sitting unused while the low-quality Composite connection is in use. If that doesn't work, then I'm back to needing something to convert the signal to Composite for short-term use.
Another option (for the Sony) would be to get something like this:
and run a long (~10') VGA extension cable the rest of the way from it to the projector. Is there much signal degradation to that long of a VGA run, as opposed to Component? This looks like a pretty standard VGA cable and has very mixed reviews in that respect:
(I have the audio output working via S/PDIF to the preamp, so just the video stuff to sort out and the system will be ready to rock!)