LG 42LB5800 - Page 45

Established
dt
Error
A. Video error
2014 1 2
Standard Repair Process
d
a
t
e
Revised date
1/13
LCD TV
Error
symptom
A.
Video
error
No video/ Normal audio
First of all, Check whether all of cables between board is inserted properly or not.
(
Main B/D↔ Power B/D
,
LVDS Cable
,
S
p
eaker Cable
,
IR B/D Cable
,
ETC…
)
2014
.
1
.
2
Normal
audio
Y
No video
Normal audio
Check Back Light
On with naked eye
On
Y
Check Power Board
12V,3.5V etc.
Normal
voltage
Y
Replace T-con Board
or module
A
nd Ad
j
ust VCOM
☞A4☞A1
( ,,p, ,
)
N
Move to No
video/No audio
N
N
j
Repair Power Board
or parts
Check Power Board 24V output
☞A2
☞A28
Normal
voltage
Y
Replace Inverter
or module
N
Repair Power
End
Repair
Power
Board or parts
Always check & record S/W Version and White
Balance value before replacing the Main Board
Replace Main Board
Re-enter White Balance value
※Precaution
☞A7 & A3
3/ 97
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