I can't get the light to come on any more. Just in the last couple weeks it has quit. it is 10 years old but doesn't get any abuse. Button on wall switch is in the unlocked position. tried unplugging and it doesn't have any affect. I can hear something clicking in the enclosure when I hit the wall switch light button. Bent out the tab in the socket. Just no power going to the wires to the light. help...