TCL HDTV connected to set top box with composite cable. Got video but no sound.

Rick_73

Commendable
Aug 7, 2016
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0
1,510
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TCL HDTV connected to set top box with composite cable. Got video but no sound. How can I fix this? STB menu and TV menu look the same.
 

Rick_73

Commendable
Aug 7, 2016
2
0
1,510
0
It's a three wire composite cable. Red and white lines are plugged into audio jacks. Yellow = video connection. It produces no sound.
 
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