LG SN8YG - Voice Commands for Sound Bar; Sound Bar Power and Function Switching; Sound Effect and Feature Control

3-7
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Only for training and service purposes.
ONE POINT REPAIR GUIDE
NO BOOTING WHEN YOU TURN THE UNIT ON, NO MESSAGE OR
“HELLO” ON FRONT PANEL
When you turn on your set, no message on the front panel, and LED doesn’t work.
1-3. LCD System power VCC_5 V, 3.3 VA (No 5 V, 3.3 VA)
1-3-1. Solution
Replace MAIN / FRONT board.
1-3-2. How to troubleshoot (Countermeasure)
1) Please check VCC_5V at TP142.
1-a) If VCC_5V is abnormal, replace MAIN board.
1-b) If VCC_5V is OK, replace FRONT board.
2) Please check VCC_5V at TP149.
1-a) If 3.3 VA is abnormal, replace MAIN board.
1-b) If 3.3 VA is OK, replace FRONT board.
1-3-3. Service hint (Any picture / Remark)
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< MAIN board bottom view >
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TP142
TP142
TP149
TP149