Re: SIEMENS COMBI MICROWAVE
assume you got model wrong
i got HB86E760B/01
these units are panasonic based. if the unit does not produce microwaves it shuts down. ie you can set the time and start it but it will shut down after about 10 secs if the mag does not start
cheapest option is the mag but if the invertor has gone estimate for changing both. have found the chapest place is ebay there is a guy in scotland and his prices cannot be beaten
unfortunatly there is no easy way of checking which one had gone. i do it by swopping in a spare mag
hope it helps
Dave