LG FA162 - Speaker no Audio Output

3-3
ONE POINT REPAIR GUIDE
2. SPEAKER NO AUDIO OUTPUT
No audio output problem occurs when you power on the unit.
2-1. Solution
Reassemble AMP IC heat-sink, replace IC101.
2-2. How to troubleshoot (Countermeasure)
1) Reassemble AMP IC heat-sink (heat-sink screw must be assembled tightly).
2) Still NG, please check CN901 Pin10 (12 V), Pin1, 2, 3, 4 (28 V).
3) If it is not appear Vcc, change SMPS board assembly.
4) After changing it, if Vcc is still NG, check CN901 Pin12 (P-CTRL).
5) CN901 Pin12 (P_CTRL) is not appear, change μ-com IC (IC101).
2-3. Service hint (Any picture / Remark)
< MAIN board top view >
< SMPS board top view >
< MAIN board top view >
CN901
HEATSINK
IC101