Sony KD-49X7 D Series Service Manual page 63

LED BLINKING: 5x (Panel Communication Error)
BFM
5-times blinking
Check
"+12.5V_TCON"
on BFM
OK
Replace the Harness
Between G/LD* Board
and BFM
NG
Replace
the V-By-One FFC
NG
G/LD* Board: G board or LD board
NG OK
Replace G/LD*Board
G/LD* Board suspicious
NG
Symptom
improve
Harness is
suspicious
Symptom
improve
V-By-One FFC
is suspicious
TV Business Division
NG
Change Change
BFM Panel (T-con)
Symptom
improvement
BFM is Panel (T-Con) is
suspicious suspicious
63
Symptom
improvement
63