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KDL-40/46/55HX850,853,855(AEP/UK/IT)
114
TROUBLE SHOOTING
3) 4 times blinking (LD Board Error)
4 time blinking
Check
BACKLIGHT_MON
at JL6017
on B* board
B* board
Between 0.84 V and 2.65 V
Below 0.84 V
Check the harness
between G* board
between G* board
and LD board.
G-LD harness
NG
OK
Light source
(Inside Panel module)
Change LD Board
LD board
Check the FFC connection
between LD board and
the light source
(inside the panel module).
LS FFC
connection
Change G* Board
G* board
Symptom
improvement
improvement
NG
Check the FFC connection
between Tcon board and
LD board.
Tcon-LD FFC
connection
Change Tcon Board
Tcon board
OK
OK
NG
NG
NG
NG
Symptom
improvement
improvement
Symptom
improvement
improvement
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