Got a GE Microwave that suddenly stopped working, showing sensor error, tried a few simple things like resetting the clock, unplugging and plugging back up but it didn't help, thanks for any help, unsure of age but think its around 5 yrs old

thanks for replying Gene, the initial information was secondhand info from my son, I tried it today and here was my sequence of events, item cooking was a bag of popcorn btw, I hit the popcorn heating button, everything came on(their was a popping noise when first pushed the button) but it never heated up, if you opened the door to microwave during the heating cycle, thats when it would show sensor error, the sensor error message doesnt stay on the display screen if it goes thru the total cycle, thinking problem might not be sensor error but heating issue. The popping noise didnt happen everytime I tried btw. thanks for any help