Which input is being used on your TV with the scart to scart lead (RGB, S-Video or CVBS)? It is possible the composite out is dead.

Does the scart to composite lead you were using have both video input and output RCA's?

If it does, then some leads a labeled backwards. Video out is labeled as video in, the thinking behind this is that this is where you will be plugging the connector into.

If it only has input or output composites, then you may have the wrong lead (based on the same issue as above).

Peter.