LG 42LB5RT, Service Manual

Page: 16 / 53

- 16 -
3. No Raster
Sy
mptom
1)
No O
S
D
and im
ag
e
o
c
cu
r at scr
e
e
n
.
2) It m
a
intains the
conditi
on
w
h
e
re
the front L
E
D i
s
gr
e
e
n
Start check
Is
the link
cable
no
rm
a
l?
Re
connect
the
lin
k
cab
le
in
P600
NO
Is
t
he
IC700
’s
output no
rm
a
l?
NO
Re
pl
ace the
VSC
D
oes minu
te
di
scharge
at
Modu
le?
NO
Is
t
he
inv
e
rt
er/
V
a
V
s
on?
C
heck
the
PDP/LC
D
Modu
le
Is
output
the no
rm
a
lity
Lo
w
/H
igh
Vo
ltage e
xce
p
t
Stand-b
y
5
V
?
Re
pl
ace
the powe
r
bo
a
rd
YE
S
YE
S
YE
S
NO