Computer to camera to external tv hookup problems

Question

I have been transferring home movies to video and then editing them on Final Cut Express v. 2.0.3. I have a Dual 2 GHz PowerPC G5 with 1024 MB of memory operating on System 10.2.8
Connections:
The camera is connected to the computer via Firewire 400. This permits me to input material from the camera to the computer for editing and output. This works correctly.
The camera also is connected via RCA plugs (red, white, yellow) to an external television set. The advantage of this is that, as I edit, I am able to see the product displayed on the TV set which is how it will be viewed ultimately, and is different than viewing it on the computer monitor.
Initially, this setup worked quite well with the video display both on the computer monitor and the external tv set. Then, somehow, a glitch developed which disrupted the ability of the editing and playback to be seen on the external television set.
I have tried this setup with two different cameras and get the same disappointing result. This leads me to believe the problem is somewhere in the computer.
When Final Cut Express is activated it recognizes the camera. I am able to place video into FCE via the camera and to capture edited video from FCE onto videotape in the camera.
The only glitch seems to be the lost ability to see and edited product on the external TV set -- a function that worked for some time and now has stopped working.
My guess is the problem is somewhere in the innards of the computer/system. Any clues to a cure?
jim reed

Answer 1

Thanks for your quick reply. I trashed FCE preferences from Library;, Prefs folder but the problem persisted.
I'm new at this so I hope the following is the information you need.
Under the sequence setting, the track size is medium, and the thumbnail display is set at "name & thumbnail".
The format is 720 by 480 frame size, 29.97 fps with stereo audio at 48.0 Khz.
jim reed