If your GFCI is working properly, it will shut off power to help
prevent a hazardous ground fault condition. First, unplug the appliance
from the GFCI. Then, plug in a table lamp or small radio that you know
is working properly. Push in the RESET button on the GFCI. The lamp or
radio should turn ON. Then push the TEST button. The lamp or radio
should go OFF. If both the RESET and TEST buttons are working, the
appliance you had plugged in it is previously is damaged and a
potential shock hazard.