Sony KDL-32HX750 / KDL-40HX750 / KDL-46HX750 / KDL-55HX750 Service Manual ▷ View online
KDL-32/40/46/55HX750(K)
109
TROUBLE SHOOTING
3-6. NO PICTURE
No Picture
Press HOME key.
Menu displayed?
B* Board
NO
YES
Replace
the LVDS FFC
Panel
(Tcon)
FFC
(LVDS)
NG
Check
BL_ON and BLINKING
at CN6401#5 & 4
on the G* Board
Both H
B* board
Replace the harness
between G* board
and B* board)
Harness
（G* to B*)
NG
Not both H
Change B* Board
G* board
NG
Symptom
improvement
improvement
Symptom
improvement
improvement
OK
KDL-32/40/46/55HX750(K)
110
TROUBLE SHOOTING
3-7. NO SOUND
No Sound
Check the Speaker
Harness
Speaker Harness
Replace
the B* Board
B* Board
Speaker
NG
NG
Check the
“Speakers setting”
Change to
“TV Speaker”
“Audio System”
“TV Speakers”
Symptom
improvement
improvement
Symptom
improvement
improvement
KDL-32/40/46/55HX750(K)
111
3-8. TV COMMANDER BUTTONS MALFUNCTION
TROUBLE SHOOTING
1) TV button malfunction
Button malfunction
on the TV
Replace the Harness
between B* to
Switch Unit
Switch Unit
Harness
Switch Unit change
B* Board
NG
NG
Symptom
improvement
improvement
Symptom
improvement
improvement
KDL-32/40/46/55HX750(K)
112
TROUBLE SHOOTING
2) IR remote commander malfunction
TV isn’t controlled
by remote commander
Green LED light
at power indicator
OK
NG
Sensor is broken
HLR Board
B* Board
OK
NG
Mechanical
(ex. bezel)
Green LED blinks
at power indicator
at power indicator
when using commander
near sensor’s window
Check the Harness
between the B* Board
and the HLR Board
Exchange the Harness
Exchange the
HLR Board
Harness
OK
NG
NG
NG
Symptom
improvement
improvement
Symptom
improvement
improvement
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