How to fix if the led light does not light up? The led light does not light up, this is a relatively common problem. However, our led lights are off. How do we fix it?

This question is often asked by readers, so let's take a look at how everyone handles it today. In fact, Professor Dengzhu once asked several electrician friends about this question.

They said that in fact, most of the LED lights do not light up due to two situations: the LED lamp beads inside the LED lights are damaged, causing an internal short circuit; the driving power supply for the LED lights is damaged.

So, if there is a fault that the LED lamp bead does not light up, can you fix it like this?

First of all, you can disassemble the LED light that does not light up, carefully observe the appearance of the LED lamp bead inside, and see if its surface is burnt black. First, make the first judgment from the appearance.

Then, let's observe the various line arrangements of the circuit board inside, and whether there is a comparison

It is obvious that the lamp beads are dropped or cracked, or the phenomenon of blackening. If there is, it means the lamp bead is broken. If not, check the drive power first.

Next, let's check the drive power. How to check it?

1. Use a multimeter to measure whether the output current and voltage are within the range marked on the aluminum plate, that is, within the rated power range.

2. Use the replacement method to see if there is a similar driving power supply. After the replacement, check whether the LED light is on to determine whether there is any problem with the driving power supply.

When you pass the above two methods, first confirm whether the LED lamp bead is broken or the driving power supply is broken. Maintenance is easy.

One is to replace the bad LED lamp beads of the LED light, and the other is to replace the bad driving power supply in the LED light. In short, if the led light does not light up, first find the reason why it does not light up, and then find the corresponding method.

In fact, if the LED lamp bead is broken, the method of replacing the lamp bead or driving power supply is not very complicated. Or, I will find a time to record a maintenance video and put it in the lamp bead group.

Of course, if you have replaced the bad LED lamp beads or driving power supply in the LED lamp, and this happens again after a period of time, it is necessary to check whether there is a short circuit or a problem of tide temperature in the LED lamp circuit.

Often, when the circuit is wet, it will also cause a short circuit, and there will be a fault that the LED light does not light up.