Sony GN3TR - Led Blinking 3 X (DC Alert and Audio Error); Dc_Alert; Audio Error

XBR-49/55/65/75X900E
TROUBLE SHOOTING
FLOW
AUDIO ERROR
2-2. LED BLINKING 3X (DC ALERT AND AUDIO ERROR)
27
Measure the Speaker
impedance by multi-meter
Less than 3Ω ?
Replace
Speaker
No
Yes
3-times blinking
(Audio Error)
Speaker Harness
Power Off Check
Go to No Sound (Power Off Check)
Power On Check
Go to No Sound (Power On Check)
Replace
G board or JK board
or AC Adaptor
NG
OK
G or JK board
or AC Adaptor
DC_ALERT
3-times blinking
(DC Alert)
Check “+5.0V_VBUS”
at C431 on B* board
4.959V<Voltage<5.285V?
Other flows
OK
NG
BMKS / BMKP board
Check “POWER_MAIN”
at pin 17/19 of CN400
on B* board,
Voltage = 18.0～20.0V or
22.5～24.5V ?
NG
G board
JK board
AC Adaptor
OK