No Audio From Speaker - LG LAB550H Service Manual

6. NO AUDIO FROM SPEAKER

When unit is connected to speaker, no audio from speaker.
6-1. IC703 (AMP IC), IC701 (DAC IC)
6-1-1. Solution
Replace IC703 (AMP IC), IC701 (DAC IC).
6-1-2. How to troubleshoot (Countermeasure)
1) Check IC703 pin soldering.
2) If there is short soldering on pin IC703, re-soldering pin IC703.
3) If problem still occurs, check DAC IC (IC701).
- Check IC701, IC702 pin soldering.
- If soldering ok, check the IC401 (DSP IC).
6-1-3. Service hint (Any picture / Remark)
ONE POINT REPAIR GUIDE
IC401 IC401
< MAIN board top view >
IC701 IC701
2-38
IC703 IC703