Sony KD-49X9 F Series Service Manual page 28

2.2 LED Blinking: 3x (Audio Error)
LED 3x blinking
(Audio Error)
Power Off Check
Go to 3.3
Power On Check
Go to 3.4
Detail of 3x LED Blinking
Error Item
Trinity DC_ALERT
AUD_ERR
Trinity3 Board: BM2A
Replace
G Board
NG
Measure the Speaker
impedance by multi-meter
Less than 3Ω ?
No
Speaker Harness
Number of STBY
LED flashing
3
3
OK
G Board
Replace
Yes
Speaker
Description
Main board 5V power rail monitoring
Audio amp error detection
(Supplementary
28
information)