• Main Board Ass’y malfunction
• MB CN303 to Front IR CN200 disconnected
• Front IR PWB Ass’y malfunction
• MB CN111 to IO BD P8 disconnected
• IO PWB Ass’y malfunction ( Back IR )
• Check the pattern generator setting is wrong
• Main Board Ass’y malfunction
• IO BD Ass’y malfunction
• MB CN111 to IO BD P8 disconnected