If my microwave didn’t have a mute function (and I couldn’t return it to get one that did) I would take it apart and disconnect the speaker.
I had to do that to the dishwasher, because even though the dishwasher could be muted it insisted on beeping before the door auto-opened to let steam out.
I got a remote controlled ceiling fan that had a speaker soldered onto the motherboard. It beeped whenever it turned on or the fan speed changed. I took it apart and stabbed the center of the speaker with an ice pick until it died. Then I covered the hole with hot glue for good measure.
If my microwave didn’t have a mute function (and I couldn’t return it to get one that did) I would take it apart and disconnect the speaker.
I had to do that to the dishwasher, because even though the dishwasher could be muted it insisted on beeping before the door auto-opened to let steam out.
I got a remote controlled ceiling fan that had a speaker soldered onto the motherboard. It beeped whenever it turned on or the fan speed changed. I took it apart and stabbed the center of the speaker with an ice pick until it died. Then I covered the hole with hot glue for good measure.
My devices will mute or I will make them mute.