LG 40LX570H

- 17 -
LGE Internal Use Only
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
TROUBLE SHOOTING GUIDE
1. Power-Up Boot Fail Trouble Shooting guide
2. No OSD Trouble Shooting guide
Check P401 Voltage Level
(13.2V, L403)
Check power connector and RL_ON
signal OK ?
Replace Power board
Y
N Y
Check IC5002
RESET an d UPDATE p in
Check switch SW501, SW502
Y
N
Check X5000 Clock
32.768KHz
Check X5000 application circuit or
Replace X5000
Y
N
Check IC5002 IIC
communication state
Check IIC line or replace IC5002
N
Check IR in put state of IC5002
57pin
Check IR board
N
Y
Re-download PTC Micom
Y
Check LVDS Cable
Check LCD Module
Control board
Y
Replace Cable
N
Check P401 Voltage Level
(13.2V, L403)
Check power connector an d
RL_ON(pin1) signal OK ?
Replace Power board
N Y
Check Q405 o utp ut Voltage(12V)
Y
Check Q405 ap plication circuit or
replace Q405
N