LG 19LH2000 - USB No Connect Diagnosis

Check the SPDIF Cable
YES
Check MAIN B’D R230
PWM Signal ?
Replace MAIN B’D IC 100
Speaker Audio OK
YES
Check MAIN B’D JK403 Replace MAIN B’D JK403
NO
YES
NO
Check the Trouble Shooting Guide
Related to Audio Problem
NO
Making
Revision
2009. 2 . 1
30/34
LCD TV
Symptom
SPDIF No Audio Problem
26~42LH2000
32~47LH3000/LH4000