Burned out bulb

Light switch failure

• For loose wiring:First turn off the power, unscrew the screws on the switch panel with a screwdriver, gently remove the switch panel, and expose the wiring terminals on the back. Carefully check whether the wires on the wiring terminals are loose. If the wires are found to be loose, tighten the screws on the wiring terminals with a screwdriver to ensure that the wires are firmly connected to the terminals. The damaged part needs to be cut off, re-stripped and connected to the terminals. After confirming that the wiring is firm, reinstall the switch panel back in place and tighten the screws；
• For wear of internal components:If you suspect that the internal components of the switch are worn, you can remove the switch from the wall, open the switch housing (some switches may require special tools or techniques to open), and observe whether the internal contacts, springs and other components have obvious signs of wear, deformation or damage. For example, burnt, blackened or thinned contacts may affect the normal conduction of the switch.

Tripped circuit breaker or blown fuse

• Check out:Turn off the power and carefully remove the housing or shade of the lamp so that you can see the wiring inside. Different types of lamps may require different removal methods. Some may require unscrewing screws, while others may be snap-on and need to be gently pried open. Carefully inspect each connection point, including where the lamp connects to the power cord and the connecting wires between the internal components of the lamp. Watch for signs of loose, disconnected, or broken wires. Loose wires may have obvious gaps at the terminal, disconnected wires will have obvious breakpoints, and broken wires may expose the metal core inside.
• Repair loose wiring:Tighten the terminal screws: If you find that the screws on the terminal are loose, use a screwdriver to tighten them to ensure that the wires are tightly connected to the terminal. When tightening the screws, be careful not to use excessive force to avoid damaging the terminal or wires.
• Reconnect the wires: For wires that have fallen off the terminal due to looseness, reinsert the end of the wire into the terminal hole first, and then tighten the screws. When inserting the wire, make sure the core is fully inserted into the terminal without any exposed parts.

Faulty light fixture

• Damaged ballast:Confirm ballast failure,if the light does not light up and is accompanied by flickering, buzzing, or not responding at all, there may be a problem with the ballast.Replace the ballast: Turn off the power to the light fixture. Find the ballast, then carefully remove the wires connected to the ballast and remove the old ballast. Buy a new ballast with the same specifications as the original ballast, install the new ballast according to the original connection method, connect the wires, and ensure that the connection is firm. Finally, put the lamp housing or lampshade back in place, turn on the power, and check whether the lamp has resumed normal operation.
• Driver damage:Determine driver failure,for LED lamps, the driver is a key component that provides appropriate power to the LED lamp beads. If the LED lamp does not light up, and after excluding the problem of the bulb itself, it is likely that the driver has failed. Some drivers may have indicator lights. If the indicator light does not light up, or the output voltage of the driver is abnormal when the multimeter is used to detect that the driver is damaged, it can be preliminarily determined that the driver is damaged.Replace the driver: Also turn off the power first, find the driver, and disconnect the driver from the power supply and the lamp. Remove the old driver and install a new driver. The specifications of the new driver must match the lamp, including parameters such as input voltage, output current and power. After connecting all the lines, restore the lamp housing, turn on the power, and check whether the lamp can emit light normally.
• Damaged socket:Check the socket condition,check if there are obvious signs of damage to the socket. You can gently shake the bulb to see if the contact between the bulb and the socket is good. If the bulb flickers, the socket may be in poor contact.Repair or replace the socket: If the socket is just loose, you can use a tool such as a screwdriver to tighten the socket's fixing screws to ensure that the socket is firmly connected to the lamp. If the inner metal sheet of the socket is deformed or damaged, try to adjust it to the normal position with a tool such as tweezers so that it can make good contact with the bulb. If the socket is severely damaged, such as burnt or irreparably deformed, you need to replace it with a new socket.

Power supply problem

Precautions to keep lights working properly

• Use high-quality bulbs and lamps to ensure durability
• Inspect and maintain your home electrical system regularly.
• Avoid overloading circuits to prevent circuit breakers from tripping.
• Schedule a professional electrical inspection to detect potential dangers as early as possible.
• If your lights suddenly stop working, fixing these common problems can help restore brightness in your home. However, for ongoing electrical issues, it’s best to seek professional help for safety and efficiency.