Sony KD-43X8301C Service Manual page 107

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
KD-43/49X8301C (FW-43/49X8370C), 8305C, 8307C, 8308C, 8309C
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)
107