Locate the electrical panel in the basement or electrical room. Open it and inspect the circuit breakers.
If one of the circuit breakers is off or tripped, turn it on. If the circuit breaker is off, it won't supply power to the GE Smart Digital Timer.
Check the wire connections if your device isn't turning on. Make sure the Hot/Live wire of the main power is connected to the black wire on the timer.
Make sure the neutral wires are connected to the white wire attached to the timer. Connect the Hot/Live wire on the load to the red wire on the timer if you haven't already done so.
Connect the ground wire to the green wire on the timer.
Tighten all the nuts if they aren't secure so the wires won't fall out of place.
Press the "Reset" button with a pointed object such as a toothpick or paperclip to restore your device to the default settings if it's still running into problems. Once it is reset, the display flashes 12:00AM on Monday.
Press the digital timer's door if you want to override the timer's currently saved settings.