LG S94T1-S Service Manual page 130

2. NO SOUND
Wireless rear speaker doesn't output a sound.
2-1. SMPS Board (No PVDD)
2-1-1. Solution
Check SMPS board (No PVDD).
2-1-2. How to troubleshoot (Countermeasure)
Check LED color of RX BOX.
Color is yellow?
Check SMPS board.
ONE POINT REPAIR GUIDE
YES
YES
NO
5-5
Try to reset.