Sony KD-49X7 D Series Service Manual page 68

LED BLINKING: 6x (Backlight Error)
BFM
6-times blinking
Check Voltage of
BL_ERR_DET
on 21pin of CN400
on BFM
Voltage < 1.9 V
G/LD* Board: G board or LD board
Check
harness/connection
Voltage ≥ 1.9 V
G/LD* board to B*Board
TV Business Division
Change
Harness /
harness
Connection
broken
Harness /
Connection OK
LED driver or G board
 Change LD board or G board.
No
improvement
Change
Panel
No
Improveme
nt
Change
BFM
68
Symptom
Harness
Improvement
No
improvement
Symptom
Improvement
Symptom
Panel
Improveme
nt
Symptom
BFM Board
Improvement
LD board/G board
68