issue with kenmore microwave over the range model?

the electricity went out, when it came back, i went to set the clock on our microwave.

1) i was able to set the clock back, however now a small letter "d" appears after the time. this wasnt there before.

2) when i put in a coffee mug and put 1 min, the light turns on and the table spins, but when i take the mug out, its cold. does this have something to do with that "d"? i am not able to set the clock without that "d", tried several times..

do i need a new microwave?

thanks.