Which brand is good for the patio lamp?
Then check that the controller load indicator is lit, you can check with the meter, detect whether there is an output voltage, and if there is no voltage output, replace the controller.
Check the lights solar controller and battery is lit, if not bright, then look at the connecting line controller and battery is not off, if the connection line is normal, the voltage with a multimeter to check the battery, if the battery voltage is normal, the controller, the replacement of a controller see is not normal use.
Finally, check the LED driver input voltage is normal, check the fuse LED driver is not flawless and perfect, if the fuse is good, with a multimeter check LED driver output voltage is not normal, if normal, go to the street lamp manufacturers for a LED lamp, if not normal then, it would change a LED drive
