Big bang while the oven was on, but now the oven still works, and the hob doesn't

[nighbynight]

that's it really.

Was cooking something in the oven - all 4 hot plates were off. Suddenly we heard a big bang, but the oven carried on going.

Next day, I realised that the hob wasn't working, but the oven was still fine, in fact we've had to cook with it for the last 24 hours.

We have one of those fitted things where the oven and hob are separate. All advice on the internet suggests that loud bang from oven = element gone, but our oven element is still working.
There is no fuse accessible to us, so I can't replace it (assuming it's gone). Anyway, surely the oven and hob would be on the same circuit? I want to check if any of the hot plates are still working, but without a fuse, I am stuck. Could all 4 of the hot plate elements have gone, and why??

I am not sure whether to call a repairer, or buy a new hob (anyway is the problem with the oven???)
Had a bad experience with the last repair man I called, he charged nearly 300, just to run the dishwasher with citric acid powder in it, basically, as I figured out later.

Has anyone had experience with the oven/hob thing?

I'd think it's far more likely that a fuse has gone, rather than all 4 hotplates breaking when you weren't even using them. The hob must be wired into the mains somewhere - can you see where the cable goes? It should be going into a plate on a wall somewhere, which usually has a switch on it and often a little removable thing with the fuse in it. It might be at the back of your cupboards rather than on the wall you can see.

Hi, thanks. No, that's just it, we can't see the fuse. In the UK, I'd expect to see the fuse at the wall, but we don't seem to have one.
I want to replace the fuse and see what is/isn't working. But I am also a bit puzzled because I would expect the oven and hob to be on the same circuit, ie same fuse, but the oven is still working.

So, where the cable joins the wall, there isn't a fuse? I guess then that the fuse / circuit-breaker must have gone in the main "fusebox" for your house then - I think the standard in the UK would be to have one circuit dedicated to the cooker, but I don't know if that's the same for separate hobs, or if all countries do the same.

But it sounds like there must be a fuse (or switch) in the box for the hob circuit which has gone and you'll have to sort that before it will come back on.

Thats what I figured too, but when I went to look at the fusebox, it is all sealed up. I can't see anywhere where I can change the fuse. It's really annoying me, soon I will have no alternative but to call a repair man.

Anyway, I am a little worried about how the HOB can have blown an element while it was off, and only the oven was on. Something wrong there.