C communication
Can not start
OK
NG
Check power cord and board interface
Plug in power cord and interface
OK
Check F901, BD901, C910
NG
Replace F901 or BD901 or C910
OK
Check D902, C920
Check D950, C952,C953,C954
NG
Replace D902 or C920
OK
Check T901
OK
Replace T901
Replace D950 or C952 or C953 or
C954
NG