There are many reasons why an LED panel light may not light up. Here are some common problems to check:

1. Power Supply: Make sure the light is properly connected to the power source. Please plug in other devices and check if the power outlet is working properly.

2. Circuit Breakers: Check your circuit breaker or fuse box to see if a breaker has tripped or a fuse has blown.

3. Wiring Issues: Check the wiring connections to make sure they are secure and undamaged. Loose or frayed wires can cause the light to not work.

4. LED Driver: Many LED panel lights require a driver to convert the current. If the driver fails, the light may not work.

5. Light Switch: Make sure the switch that controls the light is functioning properly. If necessary, test the switch with a multimeter.

6. Overheat: If the lamp is used for an extended period of time, it may overheat and automatically shut down. Please wait for the lamp to cool down before trying again.

7. LED Panel Fault: If all other checks are normal, the LED panel itself may be faulty. In this case, it may need to be replaced.

8. DIMM COMPATIBILITY: If you use a dimmer switch, make sure it is compatible with your LED lights, as some dimmers may cause flickering or prevent the light from turning on.

If you have checked all of these factors and the light still doesn’t come on, it’s best to consult a professional electrician for further diagnosis and repair.