The Samsung ME1240SC 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.
Shorted sensor's circuit.
Open sensor's circuit.
On the cooling mode, sensor's Vout was not less than 4.7V within 3 minutes.
Fuse is OK. No display and no operation at all.
Misadjustment or loose wiring of secondary latch switch.
Fuse is blown.
Open or loose wiring of turntable motor.
Open or loose wiring of secondary interlock switch.
Open or loose connection of membrane key pad to Ass'y PCB.