Sony XBR-55X850D Service Manual page 33

FLOW
2-4. LED BLINKING 5X (PANEL COMMUNICATION ERROR)
Case: BMFW2 structure
5-times blinking
Check
"+12.5V_TCON" at
CN9000 #4 (or C9011)
on the B-Board
OK
Replace the Harness
Between G-Board
and B-Board
NG
Replace
the V-By-One FFC
NG
XBR-55X850D/857D, 65X850D/855D/857D, 75X850D
NG
OK
G-Board is
Replace G-Board
NG
Symptom
improve
Harness is
suspicious
Symptom
improve
V-By-One FFC
is suspicious
Change
B-Board
suspicious
B-Board is
suspicious
TROUBLE SHOOTING
NG
Change
Panel (or T-con)
Symptom
Symptom
improvement
improvement
Panel (or T-Con) is
suspicious
33