Defunct Microwave oven (The Folders Lane Estate RH15)

Panasonic Microwave oven, 48cm wide x 28cm high x 38cm deep. Blew its 10A fuse. Tried fitting 13A fuse, but as soon switched on at wall socket, blew this fuse, then another 13A fuse. Up till then had been working perfectly. If anyone would like to try fixing it, they’re welcome.