Let us know how you get on, it may sound crass suggesting the scart lead as the first option, but it is also (potentially) the cheapest thing to try.
If that fails, we can look at other options, like seeing if your TV & the recorder have RCA stereo sound connectors?
Any 'digital' sound options will not work with just scart, so make sure any audio options are just set to 'stereo', where appropriate