Problem with A/V out box on RGB Scart lead

[Andeh]

i bought an RGB Scart lead for my dreamcast with the A/V out connections on it so I could connect it to my computers Line-in and to my tv capture card.
Well the audio works fine but theres no signal getting to the tv-card for video.
Is there anyway I can get inside this lead to try and see whats wrong?
it looks like this

[Andeh]

15 views and no one can help me?

[ptr.exe]

Sounds more like a problem with the TV card than the DC cable, but if it is the cable then test it - use the A/V bits and connect to a TV, if theres a picture then its the TV card, if there's no picture then its the cable.

Basically (if its the cable) you arent gonna be able to open up that AV block without cracking the plastic so only do this if your sure, get it open however you can (maybe wedge a knife in to split where the two sides join) and just look for capacitators or resistors that lead to the yellow plug, then test with a multimeter if they're blown (no current passes), if they are replace them. Simple.

Im not responsible by the way if whilst trying to get the AV block open you stab yourself in the hand. Good luck.

[Andeh]

yeah lol I already tried everything you said there, its is the cable since i tried connecting it to the TV and it was the same. I tried to get into the box with a knife but its a lot harder than it sounds.

[sixteen-bit]

When in RGB mode, the dreamcast appears to disable its composite video output so you won't get anything meaningful from the yellow AV socket. Unfortunately, there isn't much that can be done about this odd behaviour.

The cable itself switches the Dreamcast into RGB mode by bridging pin 7 of the AV connector to ground. If you disabled this it'd then output a composite signal for use with the TV tuner card.

[Andeh]

i see, that would make sence since I know there is a signal coming from the yellow connector, (hence it does work) but it disappears instantly.
So what you're saying is I need to break the connection between pin 7 on the rgb lead and the a/v connector on the dreamcast?

[Andeh]

ok i tried breaking the connection between pin 7 on the RGB lead and the A/V connector on the DC. All it did was disable RGB by the looks of it but the composite still did not work

[ptr.exe]

The thing is i knew that and yet didnt realise that was the cause... stupid me.

Why dont you just use composite for your TV and have a simple splitter going to the TV card on your PC? the picture quality will be worse on your TV as no RGB and you may have to buy another composite cable for the DC if you cant mod that one, but at least it will work.

[sixteen-bit]

ok i tried breaking the connection between pin 7 on the RGB lead and the A/V connector on the DC. All it did was disable RGB by the looks of it but the composite still did not work

Oh. I take back what I said then.
I was going by both of these diagrams which make it seem like Pin 7's the only one which controls RGB:
http://www.massystems.com/DC-VGA.html
http://www.gamesx.com/avpinouts/dricas.htm