LG 42LB4D, Training Manual

Page: 18 / 44

Directview LCD Training
18
Troubleshooting
VidEO
TrOUBLeShOOTiNG
NO vIdEO FlOWChART
C
he
ck
L
7
2
9
(2
.5
V)
C
he
ck
Po
w
er
c
on
ne
ct
or
R
ep
la
ce
P
ow
er
b
oa
rd
C
he
ck
T
H
C
6
3
LV
D
1
0
2
3
(I
C
6
0
1
)#
9
(D
E)
,
#
1
5
(C
lk
),
#
7
(H
sy
nc
),
#
8
(V
sy
nc
)
C
he
ck
X
2
6
0
(
IC
1
0
1
)
C
he
ck
P
6
0
0
#
4
7
(D
IS
P_
EN
),
#
3
3
(T
X
A
C
-
)
,
#
3
2
(T
X
A
C
+
)
,
#
1
7
(T
X
B
C
-
)
,
#
1
6
(T
X
B
C
+
)
C
he
ck
T
H
C
6
3
LV
D
1
0
2
3
(I
C
6
0
1
)
C
he
ck
L
VD
S
C
ab
le
C
he
ck
P
D
P/
LC
D
M
od
ul
e
C
on
tr
ol
b
oa
rd
1 2 3 4 5
Y
N
Y
Y Y Y
N N
LV
D
S
T
ra
ns
m
it
te
r
#
4
7
(D
IS
P_
EN)
3
.3
V
G
N
D
#
3
3
(
T
X
A
C)
:
#
3
2
(
T
X
A
C
+
)
#
1
7
(
T
X
B
C
:
#
1
6
(
T
X
B
C
+
)
7
4
.2
5
M
H
z
7
4
.2
5
M
H
z
7
4
.2
5
M
H
z
7
4
.2
5
M
H
z
#
(C
lk
)
7
4
.2
5
M
H
z