Read LG 42LH4000 / 42LH4010 / 42LH4020 (CHASSIS:LD91G) Service Manual online
Check IR B’D P1 Wafer
& Connector
Check MAIN B’D P1304
Wafer & Connector
YES
YES
NO
Replace it
Replace IR B’D
Making
Revision
2009. 2 . 1
34/34
LCD TV
Symptom
Intelligent Sensor Problem
32~47LH4000