The Samsung NV75J5170BS Oven has some known problems that occur often. Here are some easy to do solutions for the problems or error codes your Samsung might be giving you.
Door lock malfunctions
Sensor malfunctions
Sensor malfunctions
Sensor malfunctions
EEPROM Read/Write issue
No communication between the main PCB and sub PCB
Communication problem between the Touch IC and Main or Sub micom
Button problem
Safety shutoff