The first step in figuring out why your GE microwave will not power on is to look at the power cord. The power cord may have accidentally gotten bumped or disconnected from the power outlet. Push the power cord firmly into a grounded three-prong outlet for the best power supply.
If your power cord is connected to a working power supply and the microwave still doesn't come on, check other appliances on the same outlet. If none of them is working, there may have been a recent power failure. Replace the fuse or reset the circuit breaker if necessary.
Other possible reasons why your GE microwave will not power on could include a power surge, which can result in the microwave temporarily losing power. Unplug the microwave and wait five minutes before plugging it back in. Additionally, remove other appliances from the same outlet and move them to a different circuit to reduce the power load.
While it may seem obvious, the microwave oven will not power on or operate if the door is not closed firmly. Open and shut the microwave door until your hear a click. If your microwave oven still won't power on after performing this step and the above methods, contact General Electric or an authorized service center for assistance as there may be a problem with the motor or the wiring.