6 Times Blinking (Backlight Error) - Sony KDL-50R550A Service Manual

3)

6 times blinking (Backlight Error)

6-time blinking
Check PSU_BL_EN# at
CN201_Pin-14 on the
Main board
>=2.4V
Check PSU_BL_ERR# at CN201_Pin-13
on the Main board
>=1.8V
Check the harness PSU to
M/B connection
OK
Replace the harness
PSU to Main board
NG
KDL-42/47R500A(CH)
<2.4V
Change Main board
<=0.7V
Change Main board
NG
Fix the harness connection
Symptom improvement
OK
Harness issue
NG
Check the FFC(LVDS) Between
PSU and Panel connection
OK
Replace the FFC(LVDS) Between
PSU and Panel
NG
Replace PSU
NG
Change Panel
( TROUBLE SHOOTING )
Fix the FFC(LVDS)
connection
OK
FFC(LVDS) issue
OK
PSU issue
33