No sound since connecting set top box

No sound since connecting set top box

ANSWERS:

"Hi,

if the TV is 10 years old, is it supporting HDMI without reduction? I had the same issue with my old small TV and the solution was in the external speakers. Also, if it’s possible, you can try to connect your TV with a SCART and hope you will have sound.

Compromise → External speakers will give you a better quality of sound and you won’t have any issue anymore."