Sony KD-49X9 F Series Service Manual page 44

4.0 NO PICTURE
No Picture
Check Smart Core
Got Any Normal No
Display?
Yes
Check Other
Portion:
Ext. Video Input -
No Picture
HDMI - No Picture
Tuner - No Picture
BL_ON (L or H):
Behavior
(5x Blinking) on the main board
No
Yes
5x Blinking
Backlight
IC401 #7pin (for 4K BM2A)
BL_ON：H
Check
Replace
BL_ON the V by One FFC
Harness
BL_ON：L
V by One FFC
Harness
NG
Replace
the main Board
Symptom Symptom
improvement
improvement
Main board NG
NG
LCD Panel
(T-CON)
44