Picture Problem (Dvb-S/S2); Tuning Fail, Picture Broken/ Freezing - LG 55LA7400 Service Manual

Standard Repair Process
Error
LCD TV
symptom
☞ A6
Check RF Signal level
Check satellite setting.
- Check LNB frequency.
Normal Y
- Check satellite
Signal?
- Check Satellite connection
(DiSEqC, motor, etc...)
N
Contact with
signal distributor
or broadcaster
(Cable or Air)
Close
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Only for training and service purposes
A. Picture Problem (DVB-S/S2)

Tuning fail, Picture broken/ Freezing

Check RF signal cable (DVB satellite signal or not)
Check whether other equipments have problem or not.
(By connecting RF Cable at other equipment)
→ Set-Top-Box, Different maker TV etc
Change satellite setting
(match with installed ANT)
☞ A7
Y
Normal Check
setting? S/W Version
N
N
Normal
Picture?
Y
Close
- 43/83 -
Established
2012. 11 .30
date
Revised date
N
SVC Check
Bulletin? Tuner soldering
Y
S/W Upgrade
N
Normal
Picture?
Y
Close
3/13
Replace
Main B/D
LGE Internal Use Only