hooked up my Thomson Tivo last night and all is well except when I select live TV through it, the picture 'flickers' between dark and light every 1-2 seconds. Its difficult to explain, but is really annoying.

Its not there when I view it normally (still through the tivo). And its there on all recordings.

Any ideas? Its connected through RF and Scart. No dvds or VCRs involved. I've messed about with all the settings on the tivo but nothing works!

Its only noticible on dark pictures, and not so much on the news etc.

Please help, its driving me nuts!

Cheers
Phil