Sony KD-55A9F - Key Switch Buttons Error

5.0 Key Switch Buttons Error
67
Side key buttons error
Harness connection issue
Check harness connection
between B-board and switch
module
Change switch module Switch module issue
B-board to switch module harness
issue
OK
Change harness between B-
board to switch module
harness
NG
NG
NG
OK
OK
Main device issue
Change B-board
SYSSET
2018/09/1904:47:37(GMT+09:00)