help needed with bosch hbn9123gb oven

[dumpertruck]

hi all,advice needed please,a year ago my fan oven stopped getting hot,i replace the heating element and everything was fine,then last week whilst using the oven there was a pop and smoke from the same main oven and it lost all heat,i removed the back plate to find the element had popped again only this time the oven light stays on and you can only get it to go off by switching off at the wall,,even though i've replaced the element theres still no heat and the light stays on....any help would be very greatfully recieved.......cheers dave :( :(