Sony KD-55A8F Service Manual page 15

TROUBLESHOOTING Flow
1.0 No Power
BM2A Board Model
No Power
Check STBY 3.3V
NG
C408
Between G* Board to
near CN400
on BM2A board
OK
BM2A Board
NG
Replace
BM2A Board Harness
OK
Harness
u-Com Failure
DDCON/LDO
Main Device Failure
G* Board
15
SYS SET