outdoor accent lites

I have a series (about a dozen) lites lining the flowerbed area and last nite they did not lite. They are on a timer and the main reason for not lighting is a power interruption. I turned the timer dial all the way around and they still did not lite. I tripped the main breaker and nothing. In the past, one single lite has burned out, but it never effected the entire string. The cords are buried and only the globes and stems stick out and plug into the side of the house (and a timer). Any suggestions on what to do? Could there be a fuse somewhere? Thank you for all assistance!

 

Does the receptacle have power? Try plugging a known-good lamp into it.

Do you know what a GFCI is?

 

Not knowing the type of timer there is at times a metal slide switch in the timer that will say "manual" Slide it to see if the work. If no switch sometimes turning the dial to fool it into thinking it is time to turn on will do the same thing. When you here the timer click then now is the time to have a tester, this will come in handy to test the load, and line of the timer, to see if there is power from the breaker, or going to the lights. If now power is coming from the breaker try resetting it, If power is coming from the breaker but not going to the lights then the problem is in the timer, If power is going to the lights but the lights are not lighting then the problem is ether in the wiring feeding the lights, or the lights them self, But most likely the wiring.
Hope this helps. Art