After discovering my old Commodore 64 in the garage, I wanted to test if it still works. The power light comes on but the video connection to a modern TV is obviously an issue, as mentioned here. Well I bought this cable from ebay, and although it is red and white, it is sold as an audio/video cable, and not just audio. But I'm not picking up a signal, so either the item was misleading in its description of video, or my commodore 64 isn't working. Does anybody have experience with this cable?
Thanks for everyone's contribution on this. So based on the C-64 AV jack pinout as provided by Janka, each pin was tested using a multimeter to see which pin may be connected to which colour lead, and it seems red is video and white is audio. I think this confirms Brian's suspicion that the cable is OK, and I remember basing my purchase on similar ideas. Hence it does seem most likely that there is an issue with my C64 video. I can actually hear a faint sound when I turn it on, so the audio may be OK. Of course it's difficult to say definitively without having a working C64, but currently I'm going through some options, including all those suggested by Brian.