Key Switch Buttons Error - Sony KD-55A9F Service Manual

5.0 Key Switch Buttons Error

Side key buttons error
Check harness connection
between B-board and switch
module
NG
Change harness between B-
board to switch module
harness
NG
Change switch module
NG
Main device issue
Change B-board
OK
Harness connection issue
OK
B-board to switch module harness
issue
OK
Switch module issue
67
SYS SET