Outside outlet won't reset
#1

I plugged in my xmas lights to outside outlet. Worked perfectly for a few hours. Then outlet reipped and won't let me reset. Do I need to replace the outlet? I looked in the breaker box and nothing was tripped.
#2

Two thought come to mind:
(1) Could there be moisture in the outlet? When you plug in Christmas lights, you typically need to leave the little swinging doors open, which can let moisture in. Try using a hair dryer to dry out the outlet.
(2) You can't necessarily identify a tripped breaker by looking. Identify the breaker serving this outlet, and then turn it completely off and back on again.
(1) Could there be moisture in the outlet? When you plug in Christmas lights, you typically need to leave the little swinging doors open, which can let moisture in. Try using a hair dryer to dry out the outlet.
(2) You can't necessarily identify a tripped breaker by looking. Identify the breaker serving this outlet, and then turn it completely off and back on again.
#4

First, unplug your Christmas lights and then try to reset it. Then try plugging a lamp into it. If it works, then you've got a problem with your Christmas lights.
Are other things on this same circuit still working?
Did I correctly infer that the outlet in question is a GFCI outlet, i.e., it has a test and reset button on it? Or are the test and reset button on another outlet?
If everything except this outlet works (or even if not), then turn the power off and examine it. If all the connections look okay, then yes I'd replace it. When you do, if this is a GFCI outlet, be sure you correctly place the "line" and "load" wires and don't interchange them.
Good luck.
Are other things on this same circuit still working?
Did I correctly infer that the outlet in question is a GFCI outlet, i.e., it has a test and reset button on it? Or are the test and reset button on another outlet?
If everything except this outlet works (or even if not), then turn the power off and examine it. If all the connections look okay, then yes I'd replace it. When you do, if this is a GFCI outlet, be sure you correctly place the "line" and "load" wires and don't interchange them.
Good luck.