Comment by VBprogrammer

Just replaced a £500 IKEA combi microwave because the main circuit board is just behind the grating at the top of the door which had gotten dirty and had been slightly more enthusiastically cleaned by my partner than it was designed for.

It would have been a 10 minute job to change the circuit board but I only ever found an old advent on a Polish website. Apparently it's discontinued.

I refuse to believe every model needs a completely custom main board but there you have it.