Remove the outer cover after first unplugging it from the mains, find lamp at front r/h side and replace. Howpatrickever happens please remember you are messing around in a piece of equipment that runs at 4000volts and due to the design of its circuitry under certain fault conditions it remains lethal months after having been disconnected from the mains supply. its not rocket science as they say, but it is not for the layman either. Contact me via microwave-repairs.co.uk if you need further help.
patrick, September 2009