Sony KDL-32HX750 / KDL-32HX753 / KDL-32HX75A / KDL-40HX750 / KDL-40HX753 / KDL-40HX75A / KDL-46HX750 / KDL-46HX753 / KDL-46HX75A / KDL-55HX750 / KDL-55HX753 Service Manual ▷ View online
TROUBLE SHOOTING
3-6. NO PICTURE
No Picture
Press HOME key.
Menu displayed?
NO
YES
Replace
the LVDS FFC
Panel
(Tcon)
NG
Check
BL_ON and BLINKING
at CN6401#5 & 4
on the G* Board
Both H
Not both H
Symptom
B* Board
YES
FFC
(LVDS)
Replace the harness
between G* board
and B* board)
Harness
（
G* to B*)
NG
Not both H
Symptom
improvement
Change B* Board
G* board
NG
OK
Segment
Size
B*
Board
Type
G*
Board
Type
B* b d
Change B* Board
G* board
Symptom
improvement
Type
Type
3a
32
BAPS
GL2
3a
40
BAPS
GL6
3a
46
BAPS
GL6
89
B* board
KDL-32/40/46/55HX750,753,75A
3a
55
BAPS
GL7
TROUBLE SHOOTING
3-7. NO SOUND
No Sound
“A di S t ”
Check the
“Speakers setting”
Change to
“TV Speaker”
“Audio System”
“TV Speakers”
Check the Speaker
Harness
Replace
the B* Board
B* Board
NG
p
Symptom
improvement
Speaker Harness
Speaker
NG
Symptom
improvement
Segment
Size
B*
B
d
G*
B
d
Speaker Harness
Speaker
Board
Type
Board
Type
3a
32
BAPS
GL2
3a
40
BAPS
GL6
3
46
BAPS
GL6
90
KDL-32/40/46/55HX750,753,75A
3a
46
BAPS
GL6
3a
55
BAPS
GL7
TROUBLE SHOOTING
3-8. TV COMMANDER BUTTONS MALFUNCTION
1) TV button malfunction
Button malfunction
on the TV
Replace the Harness
between B* to
Switch Unit
Switch Unit
Switch Unit change
NG
Symptom
improvement
Harness
B* Board
NG
Symptom
improvement
Harness
B Board
Segment
Size
B*
G*
Board
Type
Board
Type
3a
32
BAPS
GL2
3a
40
BAPS
GL6
91
KDL-32/40/46/55HX750,753,75A
3a
46
BAPS
GL6
3a
55
BAPS
GL7
TROUBLE SHOOTING
2) IR remote commander malfunction
TV isn’t controlled
by remote commander
OK
Green LED blinks
OK
Green LED light
at power indicator
OK
NG
Mechanical
(ex. bezel)
at power indicator
when using commander
near sensor’s window
OK
NG
Sensor is broken
OK
NG
Check the Harness
between the B* Board
and the H*Board
S
t
NG
Exchange the Harness
Harness
NG
Symptom
improvement
S
t
Segment
Size
B*
Board
G*
Board
H*
Board
H* Board
Exchange the
H* Board
NG
Symptom
improvement
Board
Type
Board
Type
Board
Type
3a
32
BAPS
GL2
HL
3a
40
BAPS
GL6
HL
92
B* Board
G
3a
46
BAPS
GL6
HL
3a
55
BAPS
GL7
HL
KDL-32/40/46/55HX750,753,75A
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