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So yes, it sounds like your light switch has just failed. The light switch is located in the upper corner around the frame of your oven and can be seen if you open the door. Below is a link to the switch you'd want to order and replace for your model number.
CLICK HERE for light/door switch
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OK that might be the only switch then. You unit I see is located in Switzerland but these units are made in America so they may have just added a manual switch up at the control panel in place of the one at the top of the oven frame. If it's not at the top of the oven frame, then the switch at the control panel is the only one and that is the switch you'd need to replace.
OK well if this is a US appliance then there should be a switch in the upper right or upper left corner around the front frame of the oven where the door shuts. If not, then the model number you gave me isn't correct. Those are the only 2 options.