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Re: ATI card will not sense older tv as sec. display unless VCR connected, help!

Posted by Franc Zabkar on 12/17/05 04:59

On 16 Dec 2005 07:33:23 -0800, causewayclubhouse@hotmail.com put
finger to keyboard and composed:

>I have been trying to connect my older Zenith television to my ATI
>video card
>as a second display. The ATI card would sense that my Toshiba tv had
>been connected with no difficulty and show it is as active . But with
>the older Zenith tv, it will not sense my connecting it unless I run
>the connection through the VCR. If I connect the video card RCA out
>to the television aux in, the card will not sense the tv and activate
>it as a second display device.

Maybe your card needs to sense a 75 ohm termination. You can test for
this by connecting a 75 ohm resistor across the card's RCA video
output pins. This should simulate the presence of a TV.

With your TV unplugged, what resistance do you measure at the TV's RCA
video inputs? What about your Toshiba TV? Is it possible that the
Zenith's AV inputs are AC coupled while the Toshiba's are DC
coupled??? What resistance do you measure at the VCR's AV inputs?

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

 

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