I want to connect my DVD player which has a SCART output to a computer LCD monitor with VGA input. The DVD player supports the Progressive scan mode. It supports both PAL and NTSC.
I've built this adapter and it "works":
In PAL mode, the monitor is showing 800 x 600 @ 50 Hz and in NTSC 640 x 480 @ 60 Hz.
Only one problem: the image is greenish. First I thought I miss-connected or didn't connect R and B signals, but if I look at the picture it has red and blue colors too. White picture appears green. Red and blue appear darker than normal. There is a green tint over the picture.
One thing I noticed: the whole signal is transmitted via the green wire. I can disconnect all, if I leave green and ground connected I get picture. The two transistor circuit appears to have no use at all because it works the same without it (as long as I provide R, G, B). This makes me believe that the green signal is also carrying sync data (sync-on-green).
I've tried adding potentiometers, capacitors over green signal but with no luck. The picture disappeared. I've tried all possible settings on my DVD player. It only works with progressive scan enabled.
UPDATE: I guess I found the cause on http://www.curtpalme.com/CRTPrimer_17.shtm:
If you connect a component signal to an RGB input, you’ll only get a green image. The R and B output will be very low.
It is exactly what @DoxyLover said.
What can I do to make the green color less intense? Will a simple transistor voltage amplifier for the Red and Blue channels solve things?