Sony XR-55A95K Service Manual page 59

TROUBLESHOOTING
5.3 CAS ID Unknown
Backlight level does not
change when ambient
light changed
Check UI setting and Setting is "ON"
make sure light
sensor setting is "ON"
Setting is "OFF"
Setting issue
Change setting to "ON"
Check harness
NG
connection between
Main board and Smart
Core
OK
OK
Change harness
between Main board to
Smart Core harness
NG
OK
Change Smart Core
NG
Change Main board
Main device issue
Harness connection
issue
Main board to Smart Core
harness issue
Smart Core issue
59
SYS SET