LG 26LH20D (CHASSIS:LB91A) Service Manual ▷ View online
Check MAIN B’D
JK406 Pin #1 5V ?
NO
Check MAIN B’D
R848 12V ?
Check that the USB Memory & HDD are supported by Spec
(Refer to User Manual’s USB cautions)
YES
Check MAIN B’D
R826 5V ?
Replace MAIN B’D IC808
YES
NO
Replace POWER B’D
YES
YES
Replace MAIN B’D IC 100
Check MAIN B’D
JK406 OK ?
YES
NO
Replace MAIN B’D JK406
Making
Revision
2009. 2 . 1
23/25
LCD TV
Symptom
USB No Connect Problem
Check IR B’D P1 Wafer
& Connector
Check MAIN B’D P5001
Wafer & Connector
YES
NO
Replace it
YES
Replace IR B’D
Making
Revision
2009. 2 . 1
24/25
LCD TV
Symptom
Remote Control Problem
Check IR B’D P1 Wafer
& Connector
Check MAIN B’D P5001
Wafer & Connector
YES
YES
NO
Replace it
Replace IR B’D
Making
Revision
2009. 2 . 1
25/25
LCD TV
Symptom
Intelligent Sensor Problem
Check IR B’D P1 Wafer
& Connector
Check MAIN B’D P5001
Wafer & Connector
YES
YES
NO
Replace it
Replace IR B’D
Making
Revision
2009. 2 . 1
25/25
LCD TV
Symptom
Intelligent Sensor Problem