No Picture - Sony XBR-55X850C Service Manual

3-5. NO PICUTURE

No Picture

No
Got Any Normal
Display?
Yes
Check Other
Portion:
Ext. Video Input -
No Picture
HDMI - No Picture
Tuner - No Picture
XBR-55/65X850C, 855C, 857C, 75X850C, 855C
BL_ON (L or H): IC9017 #18pin (for 4K BMFW/BMFL board)
Check Smart Core No
Behavior
(5x Blinking)
on the main board
Yes
5x Blinking Backlight
BL_ON：H
Check Replace
BL_ON the V by One FFC
Harness
Symptom
BL_ON：L
improvement
V by One FFC
Harness
TROUBLE SHOOTING
NG NG
Replace
the main Board
Symptom
improvement
Main board NG
LCD Panel
(T-CON)
156