[MarkTaylor]

Your TV is designed to use a digital optical cable for output.

This is increasingly common as the predominance of digital inputs grows so making digital output a preferred option.

If both your SCARTs are in use then that just leaves the headphone output which is hardly ideal.

If you can use one of the SCARTs then just look for a SCART to Y/R/W output adapter. These are common and often have a selector switch for input/output just make sure you don't buy one specifically listed as 'input only'.