Sony KD-84X9000 Service Manual page 83

3) 4 times blinking (LD Board Error)
4 times blinking
Check
BACKLIGHT_MON
at pins 18/20 of
CN6001
on BAPS board
Between 0.84 V and 2.65 V
Check the harness
between G* board
and LD board.
OK
Check the FFC connection
between LD board and
the light source
(inside the panel module).
OK
Check the FFC connection
between ON3 board and
LD board.
OK
XBR/KD-84X9000 Series(WW)
Below 0.84 V
BAPS board
NG
G-LD harness
NG
LS FFC
connection
NG
ON3-LD FFC
connection
Symptom
improvement
Change G* Board
NG
Symptom
improvement
Change LD Board
NG
Symptom
improvement
Change ON3 Board
NG
Light source
(Inside Panel module)
TROUBLE SHOOTING
G* board
LD board
ON3 board
83