Yeah, replace it. You should be able to just replace the lamp and not the whole fixture. I've had enough LEDs go bad on me that sometimes I kinda wish I'd kept the flourescents.
All the hoopla about LEDs lasting nearly forever is a load of BS.
I've never had an issue with any of the replacement LED's I've used, either by converting the fixture using an LED tube or by replacing the whole fixture.
The LED itself will last a very long time, the issue is cheap boards and wiring used to make the rest of the fixture. There's a lot of cheap crap out there with LED's, if you buy actual quality stuff you should have a MUCH lower replacement rate than anything fluorescent or incandescent. Of course, if you buy cheap crap, not so much.