First check:
Only TV
1. TV normal or surround?
If normal check L and R sound. High or Low?If low let me know
If s/sound do not connect any AV inputs just check through speakers and aerial input.
High or Low?If low Let me Know
Then check:
Only DVD Player
2. DVD Player DV-575A normal or surround?
If Built in s/sound check Not connected to TV only speakers Now Play NOTE: ORIGINAL CD and DVD check sound.
High or Low? If low Let me Know
3. Now check both connected together through Scart/ phono
4. If all OK good sound go below if No Re- check cables to inputs and outputs or one of the above is faulty also check menu settings for sound modes.
5. Go to PC section of the Forum.