Panasonic microwave start button doesn't work

Probable magnetron or control board failure

What does the start button have to do with opening the door?

Microwave ovens are very complex to work on. You may have a defective door sensor, which will prevent the oven from starting. This is the most common issue.

This is either the door sensing switch (most likely) or a bad membrane switch [start switch] (that's what Panasonic calls it) on the touch pad. The contacts on the door sensing switch can be slightly contaminated and not read "zero ohms" to the control PCB. The control board thinks that the door is open and it will not allow the cook cycle to start.

most of the time when button of that type goes out it usually is broke
the push pad button pushed so many times breaks the wire loose from the back side of the button

There will be a reset switch button on your microwave's timer or somewhere on the appliance. Try the button and if it doesnt work then call customer care. It seems like a minor problem and can be fixed quickly..

The magnetron is the likely problem, {heart of the microwave oven}

@William Miller - where are you located if i'm interested in your help with the microwave repair? I'm having the similar issue with the Start buton not working for my Panasonic NNSD697SS. Thanks

the child lock feature is activated.

if you can look at your manual, it would be stated there how to activate and deactivate your child lock option.

tnx 4 using fixya

drcool