Usb No Connect Problem - LG 42SL90QD Service Manual

LCD TV
Symptom
Check that the USB Memory & HDD are supported by Spec
(Refer to User Manual's USB cautions)
YES
Check MAIN B'D
JK406 OK ?
NO NO
YES
Check MAIN B'D
JK406 Pin #1 5V ?
YES
NO
Check MAIN B'D
R826 5V ?
YES
NO
Check MAIN B'D
R848 12V ?
YES
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes

USB No Connect Problem

Replace MAIN B'D JK406
Replace MAIN B'D IC 100
Replace MAIN B'D IC808
Replace POWER B'D
Making 2009. 2 . 1
Revision Revision
23/25
LGE Internal Use Only