Sony KDL-32EX721 Service Manual page 58

3) 4 times blinking (Balancer Error)
4-time blinking
Check
PANEL_FAIL at
pin 7 of CN6002
on the B* Board
Between 0.84V to 2.65V
Change G* Board
NG
Change LED Driver Board
Panel
KDL-32/40EX720,721,723,724(AEP/UK)
Below 0.84V
B* Board
Symptom
improvement
G* Board
Symptom
improvement
LED Driver Board
TROUBLE SHOOTING
58