Sony XR-55A75L Service Manual page 56

TROUBLESHOOTING
2.0 LED Blinking: 2x (Main power Error) – XR-83A80*
2x blinking
"12.7V_MAIN" Voltage > 13.2V?
Yes
G* Board
BM5S21 : Pin 5, 7 of CN1700
No
B* Board
56
SYS SET