Not really as in a pure Microwave its the microwaves that heat the food, in
a convection oven you can, assumedly, just use that part with no microwave
in the mix. These tend to use normal elements and a fan!

Sounds like it might be a control board issue. One assumes the display is
still telling you all is well etc?
I guess the parts probably have protection for each device. On the
Microwave side its normally a diode that goes and trips the fuse. I'm
assuming it no longer hums loudly when microwave is used? It would seem odd
if the convection oven was on the same fuse, but I guess it could be, which
would shut both off, and you would need to find out which one is the fault.
Did the element short or did the microwave psu die?
Strange that the other heating element is separate though..
Brian

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"Mike Halmarack" wrote in message
...
A very old friend, my Sharp combination microwave, convection oven and
grill lost functionality last night. Currently the grill heats as
usual, the fan blows and the turntable rotates but neither the
convection oven nor the microwave produce any heat.

When working do they share the same heat source?

I looked at some YouTube videos showing an "easily fixable" fuse
problem but these videos are about simpler machines.

I changed the turntable drive motor a couple of months ago with quite
pricey spares, so I feel quite committed to keeping this model going.
If they do share the same heat source I'd be more encouraged to delve.
--

Mike