Start button does not work - Sharp R-1510 Microwave Oven

Try some electrical contact cleaner. Tip the machine on its back.

How To Fix Breville Toaster Oven Start Button: 2 Solutions

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Feb 9, 2021 - If your Breville toaster oven board is warped, your oven Start button doesn't work properly. The most common problem is when you press the Start ...

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Safety system locking out the start switch. Door not closed, mode and timer not set etc.

You could have a bad membrane switch on the touch pad. Or, if the touch panel is connected to the main board via a ribbon cable, it might have a bad connection on one end. Electronic contact cleaner can sometimes be used to fix the latter.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/david_29ad5d1dd86564b0

holding the stop / clear button for 5 seconds or the start button for 5 seconds usually works,
see this link
http://www.fixya.com/support/t8306273-unlock_digitals_butons

Does it have a start button?

Yes! the keypad will need to be replaced, but there is a possibility the keypad control board may also need to be replaced.

I think you are right on the money, the keypad control board is vital to the operation of the microwave oven, if the problem cannot be resolved it will require a complete replacement of the above mentioned part, unfortuneately cost should be considered.

i have the same problem.. with the start button, could you resolve yours?

This may not solve your problem, but on my Sharp R315J microwave, the little plastic pin that pushes forward on the inside of the start button, had broken off and it wouldn't start. The Minute Plus button would start the microwave, so I knew the microwave worked, so I tried to find a piece of plastic that I could glue into the start button hole, because the part doesn't exist and you have to buy the whole door for $100 plus shipping. Nothing I could find was small enough, so I started looking for a new microwave.
While ouside doing lawn work I noticed a small bird tail feather and the end looked to be the perfect size. I snipped off the pointed end and then up about 3/8" to make a little rod to replace the plastic one that broke. It fit perfectly!!! I didn't even have to glue the inside end, it stays put even after repeated door opens. This is sturdy material and looks to last a long time. When it wears out, I have a cat, there's always a few feathers around. I hope this saves someone else a hundred bucks, like it did me.

I have a related problem, my Siemens microwave/oven as soon as I press the start button brings down the fuse. I put up the fuse again, the clock is working, the light inside as well, but as soon as I set the microwave on and press the start button, it brings the fuse down again. Is this a problem with the siemens microwave or with my electrical installation?