I'm running out of ideas on how to fix the following problem. All ideas appreciated.
I have a 2 3-way light switches (one at the top of the stairs to my basement and one at the bottom). Both control 2 lights. One day they randomly both went out. I checked both bulbs and both are fine and also checked the switches going different ways to make sure it wasn't a switch problem. Next, I reset all GFCI outlets on the first floor and in the basement and still nothing. I've also turned the breakers off and back on and still nothing. Finally, I purchased a voltage tester and it appears that no voltage is going to the light switch in the basement, but the switch at the top of the starway is getting voltage. It appears the basement switch is the lead switch. I've turned this switch up and down and in each scenario, there is no voltage coming to the switch.