Sony KD-49X9 F Series Service Manual page 14

TROUBLESHOOTING Flow
1.0 No Power
BM2A Board Model
No Power
Check STBY 3.3V
NG
NG Replace
C408
Between G* Board to G* Board
near CN400
BM2A Board Harness
on BM2A board
OK
OK
Harness
BM2A Board
u-Com Failure
DDCON/LDO
Main Device Failure
14