42LB5RT (CHASSIS:LP7BA) - LG TV Service Manual (repair manual). Page 14

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- 14 -
TROUBLESHOOTING
1. No 
po
we
r
Sy
mptom
1) Minute
 dis
ch
arg
e
 d
o
e
s
n
’t  o
c
cur
 at modul
e
.
2) Front  L
E
D  do
e
s
n’t 
c
o
me 
into 
a
c
tion.
Start check
Is
 in
ser
ted  a
 p
lug 
in
 powe
r
 co
rd?
Is
 connected the L
ine 
Filter and P
S
U
?
Is
  
nor
m
a
l the fu
s
e
 of
 
PSU? Plasma
(F
101)
LC
D(
F111
)
Plug 
in
 a
 powe
r
 co
rd
 
C
onnect  a  cab
le
.
Plas
ma
 (
E
L1
1
), 
LC
D
(SC100
)
Re
pl
ace  the  fuse
Is
 it conn
ected
 tha
t
 
PSU
 and 13
p
in
 cabl
e
 
in
 VSC
 board
?
 
C
onnect  the
 13pin  cab
le
.
YE
S
YE
S
YE
S
YE
S
NO
NO
NO
NO
Afte
r
 re
mo
ve
 a
ll cab
le
s
 con
nec
ted to 
PSU
(except
the C
N
101)
a
u
thor
izes
 the 
AC
 
vo
ltage ma
rk
ing 
on manual. 
W
hen 
ST
-b
y 5V doesn’t  op
e
rate
,
 rep
lace 
PSU
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