Given that the oven is 10-15:years old it might be simpler and better to get a new one, which would have a warranty. It'd also beca LOT safer than trying to examine the old one. Microwaves can still be lethal even when unplugged.
Ejejrj
October 2023
I can answer this question...
Russell Hobbs Microwave 'HOB GJ/AL31' does NOT heat?