Read Sony KD-55X8500A (serv.man2) Service Manual online
2) 4 times blinking (LED Voltage Error)
KD-55X8500A/65X8500A(CH)
107
TROUBLE SHOOTING
4-time blinking
Check JL9112
(BACKLIGHT_MON)
on the B* Board
B* Board
LED driver
Between 0.98V to 1.23V
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