LG SP8YA Service Manual page 46

PROTECTION ERROR
No display or No Sound.
3-3. B(BURNT) PROTECTION
3-3-1. Solution
Replace AMP board.
3-3-2. How to troubleshoot (Countermeasure)
1) Check GVDD, VDD voltage (12 V) of IC700, IC701, IC702 pin1, 2, 22.
- If GVDD, VDD voltage has 8.5 V under, refer to STEP 1-1.
2) If 12 V is OK, replace AMP board.
3-3-3. Service hint (Any picture / Remark)
ONE POINT REPAIR GUIDE
IC702 IC702
IC701 IC701
IC700 IC700
< AMP board bottom view >
3-13
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