Problems with television

I have long used an iMac G4 with an Apple Video Adapter to connect the former to a television via composite video. Never had any problems, until now.
For some reason, the iMac now sees the TV as a VGA monitor (so it says in the Displays Preference Pane). As a result, the video on the TV is unviewable. How can I get it back to seeing the TV as an NTSC display? I've reset the PRAM, reset the NVRAM, rebooted with and without the TV connected, unplugged and plugged the adapter in. What's going on? Do I need a new adapter? And why would it see the TV as a VGA display? I'm not using an Apple VGA Adapter.

Welcome to Apple Discussions Misstic,
Which iMac G4 and video adapter do you have? Some do not support the video adapter. Here's one case where certain iMac G4 does not support certain video adapters::
http://docs.info.apple.com/article.html?artnum=75369
where it says:
Important: The Apple VGA Display Adapter (M8639G/A) should not be confused with the Apple Video Adapter (M8734G/A). The Apple Video Adapter (M8734G/A) is not compatible with the iMac mini-VGA monitor port.
To tell if your iMac is the one:
http://docs.info.apple.com/article.html?artnum=86793
Note, other iMac G4 models are mentioned at the bottom of the article http://docs.info.apple.com/article.html?artnum=75369 which have similar related articles.
If yours isn't the one mentioned in the title of 75369, articles 75495, or 88282 may apply.

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Mac know about the problem with iDVD6 and are working on it!
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