Light doesn't want to turn on.?

Recently the light in our laundry room has nor wanted to turn on. At first we assumed the bulb just died, but after replacing the bulb the problem wasn't fixed. After that we changed the light switch that too had no effect. Then we changed the light fixture thinking that was the problem. But, despite our hopes, still does not want to work. Before calling an electrician, i was wondering if anyone has ideas.
Light doesn't want to turn on.?
Depending on how the house was wired,matters which wire(black or white)is power or ground.Usually the power is sent directly to the light and the switch controls the ground.The bare wire or green wire grounds the switch,light or outlet to the main fuse box.

With a volt-meter,take the light fixture out,set the meter to 400 ac,check the black wire for voltage with the red lead and connect the black lead to the round hole in a wall outlet to get your ground.If no voltage,try the white wire for voltage.If still no voltage,I think your light doesn't work on the same power circuit you think works with other things in the house.

If you don't have access to a volt-meter,go to Home Depot or any hardware store and they have a small test light with two wires that usually handles up to 600 volts.Ask if they have some type of extentions you could add to reach the long distance between the light fixture and the wall outlet.
Light doesn't want to turn on.?
well theres the fuse box fuse switch and the outlet and wall switch only thing left is wiring
check the fuse man,,



did you check all the fuse's are working;;