Sony KD-55A8F Service Manual page 30

2.3 LED BLINKING 4x (TCON Internal Error/TCON I2C Communication Error)
BM2A
OK
Replace FFC Cable
FFC Cable
Detail of 4x LED Blinking
Error Number of STBY
Item LED flashing
Trinity LD_ERR
3
Trinity3 Board: BM2A
TCON I2C Communication)
Low
"LD_ERR_DET" Voltage
(B<->TCON)
at CL4458 on BM2A Board
(TCON I2C Communication)
NG
BM2A Board
Segment
4 CR
CR
4
4-time blinking
(TCON Internal/
High
Check
(TCON Internal)
Description
TCON internal error
TCON I2C communication error
NG
Replace TCON board
OK
TCON Board
(Supplementary
information)
Panel
30
SYS SET