Hi I went to put a hob ring on and a popping sound came from the cooker, that which you would hear if a fuse has blown. I opened up the socket in the wall thinking I would find a small fuse, which I could replace. There wasn’t one that I could I see, do I require an electrician? Or can requires fuses be brought from an electric store? Even the 3-prong plug socket, which shares with the cooker switch, now does not work. Any help would be appreciated.