LG 32LN49XX / 32LN4900 (CHASSIS:LB35B) Service Manual ▷ View online
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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
Contact with
signal distributor
or broadcaster
Close
N
Check
Tuner soldering
Replace
Main B/D
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Color
error?
Y
N
※ Check and
replace Link
Cable
(LVDS) and
contact
condition
replace Link
Cable
(LVDS) and
contact
condition
Y
N
Replace Main B/D
Color
error?
Check error color
input mode
Check color by input
-AV
-COMPONENT
-HDMI
Y
External device
/Cable
normal
AV/
Component
error
Check
external
device and
cable
Y
External device
/Cable
normal
HDMI
error
Check external
device and
cable
Replace Main B/D
Replace Main B/D
N
N
A. Video error
Color error
☞A7
N
Y
End
Replace module
Request repair
for external
device/cable
Color
error?
Check Test pattern
☞A10
☞ A8/ A9
Standard Repair Process
Established
date
Revised date
5/14
LCD TV
Error
symptom
2013. 01. 24
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Screen
normal?
N
Y
Check external
device
connection
condition
Y
N
Check and
replace Link
Cable
Normal?
Y
Screen
normal?
Replace
module
Check color condition by input
-AV
-Component
-HDMI
End
Vertical/Horizontal bar, residual image, light spot
Request repair
for external
device
A. Video error
Vertical / Horizontal bar, residual image,
light spot, external device color error
light spot, external device color error
☞A10
External device screen error-Color error
AV
Input
error
Connect other external
device and cable
(Check normal operation of
External Input, Component,
and HDMI by connecting Jig,
pattern Generator ,Set-top
Box etc.
N
Y
Replace
Main B/D
Screen
normal?
Check screen
condition by input
-AV
-Component
-HDMI
Request repair for
external device
Component
error
HDMI
Connect other external
device and cable
(Check normal operation of
External Input, Component,
and HDMI by connecting Jig,
pattern Generator ,Set-top Box
etc.
Replace
Main B/D
Screen
normal?
N
Y
Check S/W Version
Y
N
Check
version
S/W Upgrade
Y
N
Normal
screen?
End
Y
N
Replace Main B/D
Replace
Module
Screen
normal?
End
Established
date
Revised date
6/14
LCD TV
Error
symptom
Standard Repair Process
☞A7
☞ A8/ A9
Check Test pattern
N
2013. 01 .24
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B. Power error
No power
Power LED
On?
Y
N
DC Power on
by pressing Power Key
On Remote control
Y
N
Normal
operation?
Check Power
On ‘”High”
On ‘”High”
Check Power cord
was inserted properly
Check
Power LED
Power LED
Replace
Power
B/D
Measure voltage of each output of Power B/D
N
Y
Normal
voltage?
Replace Main B/D
Y
OK?
Replace Main B/D
N
Y
Normal?
Check ST-BY 3.5V
Replace Power B/D
N
Y
Normal
voltage?
Replace Power
B/D
Y
☞A11
☞A12
☞A13
☞A4
Standard Repair Process
Established
date
Revised date
7/14
LCD TV
Error
symptom
. Stand-By: Red
※
Close
2013. 01 .24
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