No...not at the time. Microwave is installed directly over stove which is also a GE appliance
What were you cooking in the micro and for how long?
When it made the popping noise did you see sparks inside the unit?
It will be the board. Leave the unit unplugged until it is repaired. With the unit unplugged remove the screws around the filter holder on the bottom. Inspect all the wiring and the light sockets. If they shorted down this will be what blew the board. Other wise it will be just the board. Compare the age and cost of this repair to see if it may be better to replace the unit. They start around $300.
Click here for parts #14 on the look up