LG 37LV370S Service Manual page 42

Standard Repair Process
Error
LCD TV
symptom
※ Check antenna
signal
- Check Signal
Strength and Quality
Check and fix
※ Digital signal
cable
measuring device or
signal/connector
digital ANT
※ Check expert mode
with user remote
controller
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Only for training and service purposes
A. Video error
Video error, video lag/stop
* Check point
1) Digital signal disconnected?
2) Analog video signal weak?
Case 1)
Y
Normal
signal?
N
Case 2)
Connect external device RF signal
Y
Normal
screen?
N
☞150
Check S/W
Version
Version
exists?
Y
S/W Upgrade
Check and fix
Normal
ANT signal
screen?
(Request to
cable/antenna
Y
provider)
End
Established
2008. 2 . 1
date
Revised date
Replace Main
N
End
B/D
N
Electronics 6-3
3/13
LGE Internal Use Onl