I think it could be 2 or 3 years old, I am a TV engineer and it has been brought into our workshop.
I am thinking this is more a software problem as the sound is missing on the transmitted channels when DVD or HDD is selected , what is the service mode code
If it play,s a DVD ok with sound , can it possibly be the laser.
Can you tell me what code to access the service mode
It play/s DVD's OK and existing recordings on the hard drive,but new recordinsgs on DVD & hard drive have picture but no sound.