LG 37LF2500 Service Manual page 29

Standard Repair Process
Error
LCD TV
symptom
. By using Digital signal level meter
. By using Diagnostics menu on OSD
Check RF Signal level
( Menu Setup Diagnostic)
- Signal strength (Normal : over 50%)
- Signal Quality (Normal: over 50%)
Y
Check whether other equipments have problem or not.
Normal
Signal?
N
Check RF Cable
Connection
1. Reconnection
2. Install Booster
N
Normal
Picture?
Y
Close
A. Picture Problem
Picture broken/ Freezing
(By connecting RF Cable at other equipment)
DVD Player ,Set-Top-Box, Different maker TV etc`
Y
Normal
Picture? S/W Version
N
Contact with signal distributor
or broadcaster (Cable or Air)
Established
Revised date
N
Check SVC
Bulletin?
Y
S/W Upgrade
N
Normal
Picture?
Y
Close
3
2008. 3 .05
date
Menu Setup Booster
Booster menu
Normal
On Off: Check
Picture?
Off On: Check
N
Check
Tuner soldering
Replace
Main B/D
3/13
Y
Close