Grill, top oven and all lights not working after... Hi all Grill on our one and a halve year old

Question

Hi all Grill on our one and a halve year old unit blew a couple of days ago. Spectacular spark display came out of the open grill door when it blew. Also noticed clock/timer display and orange indicator lights for grill /top oven selector k**b and temperature control light not working just after the element blew. When checking if the bottom oven was operational the oven light stopped working also. Bought replacement grill element and bolted it on but grill, and all above still not working. Can anyone give me some advice on whats wrong and if DIY repair is feasable and if not approxomation of likely costs