Domestic Appliance Forum

I have a Lamona HJA7040 built-in microwave oven with grill. when I went to use it today there was smoke and sparks coming out from behind a small card like item situated to the right of the light. The smoke and sparks appear n as soon as the start button is pressed. What is causing this and can it be fixed. Can the card like item be replaced, if so how much would it cost and where can I get one.
Many thanks for your time
LB