The door won't open on our NN ST477. I've taken off the panel and see that the reason is the door button - which has for some time been looking askew when pressed in - doesn't any longer push the next part up enough to raise the release to let the door open. I can obtain a new door button, but how do I take out the old one and put in the replacement? Is there somewhere online a service manual for a NN ST477?

paulmw, July 2012

With mine, I found that I couldn't ease the button off without damaging the surround. I took off the top and sides (just 4 screws on the back) and found that if I held the hinged component (the one that the button contacts) up out of the way I could push on the active parts of the button, and it popped out very easily.

Rob T, December 2013

Since posting my question, I've learnt the answer and now pass it to anybody else who might need it. If the door release button is lopsided in its slot, that means one of its two small guide rails has broken off. So you pop the button out with a screwdriver (without taking off the back panel as I'd done) and put in a new button. This you can buy online for £ 4.99 at http://www.buyspares.co.uk/panasonic/panasonic-microwave-spares/catalogue.pl?shop=panasonic&path=107445

Cheers

Paul, July 2012