Oven?

Assuming the oven is completly dead (no indicator lights, no clock display, no nothing), the fault has to be between the last point you can verify there is power (the wall outlet where the oven and hob feeds split and the point in the oven where the feed splits to feed the separate circuits (clock, fan, various elements, grill, etc.

I doubt there is an internal fuse however for the oven to be completely dead suggests a simple fault or operator error.

Check the supply connections at the wall and at the oven, properly. Check the cable.

Explore labels etc., in the back and around the door and see if here is a model number. The Samsung domestic appliances support website may advise you where to look.

In the final analysis the choice is yours: risk a few quid by getting a techie friend to look at it or ignore he chance it is something simple and go for a new oven.

The only other way is to learn about electricity and domestic appliances for yourself.

acp
March 2017