Hi my name isXXXXX old is the microwave?
Most of these types of over the range microwaves cost in the range of 200-275, from the description of your problem with the fuse blowing on startup and a spark at the capacitor and diode, is an indication of either a bad capacitor or diode and it would be wise to replace them both if you are going to repair it. The other cost would be labor if your not going to repair on your own and that would be in the range of 125-150.
On most appliances the life range would be 8-12 years
Being it's that old I would advise against spending that much on a repair.
The other thing to be concerned with is the magnetron?
Problems in the capacitopr and diode could take out the mag tube
Thats what I thought could replace them myself @ a cost of 180.00 but ca buy a new one non convection for 179.00, unless I coukld get the parts cheaper.
Yes you can find them at around that price throughout the year, that is a good price what brand is it?
On my way to scrap yard,Samsung 1000 watt
I just looked on sears parts direct, they have the capacitor at around 90
and the diode for 27
but if you can buy one for 179 then I would replace it
Just removing it from cabinet was a chore think I will just get the new one and install it in same spot,Thank you for advice & knowledge,have a good day!
Your welcome and thank you, XXXXX XXXXX and have a great evening.