Read LG 50LN5400-SA / 50LN5400-SB (CHASSIS:LJ36B) Service Manual online
A. Video error
Tuning fail, Picture broken/ Freezing
Y
N
☞
A5
Check RF Signal level
Normal
Signal?
Check
S/W Version
S/W Upgrade
SVC
Bulletin?
Normal
Picture?
Y
N
Y
Close
Check RF signal cable
Check whether other equipments have problem or not.
(By connecting RF Cable at other equipment)
→ Set-Top-Box, Different maker TV etc
☞
A6
Standard Repair Process
Established
date
Revised date
4/14
LCD TV
Error
symptom
2012. 01 .14
Contact with
signal distributor
or broadcaster
(Cable or Air)
Close
N
Check
Tuner soldering
Replace
Main B/D
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