The contact owns a 2017 Keystone Montana equipped with a High Pointe EC942KIW RV Over-the-Range Convection Microwave - 1.5 C/F. The contact stated that upon the start of the microwave, a spark emitted from the microwave. The contact immediately stopped that microwave and unplugged the microwave from the electrical unit. The contact also stated that she noticed a black, burn spot on the back of the microwave where the electrical wire connects. The contact called the microwave manufacturer and they offered no assistance. The microwave had yet to be inspected or replaced. The VIN was not available.