Troubleshooting Guide - LG 47LT760H Service Manual

1. Power-Up Boot Fail Trouble Shooting guide
Check P2401 All
Voltage Level (3.5V, 12V, 24V).
Y
Check Q2407 output
Voltage(12V).
Y
Check LVDS Cable.
Y
Check LCD Module
Control board
2. No OSD Trouble Shooting guide
Check P2401 All
Voltage Level (3.5V, 12V, 24V).
Y
Check IC8700 RESET pin.
Y
Check X8701 Clock
10MHz.
Y
Check IC8700 IIC
Communication status.
Y
Check IR input state of IC8700
13pin.
Y
Re-download NEC Micom
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TROUBLESHOOTING GUIDE

N
Check power connector and
RL_ON signal OK?
N
Check Q2407 application circuit
Or replace Q2407.
N
Replace Cable.
N
Check power connector and
RL_ON signal OK?
N
Check switch SW8700.
N
Check X8701 application circuit
or Replace X8701.
N
Check IIC line or replace
IC8700.
N
Check IR board.
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N
Replace Power Board.
N
Replace Power Board.
LGE Internal Use Only