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There is a problem with the circuit of the LED, it may be that the connector of the switch is loose. Twist it again with a plum blossom knife and you'll be fine. The other two ways are normal, which means that the LED connector has fallen off, re-screw, and install it. The lights are all good ......
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It may be that the rectifier is burned, take it off and take a look.
How to fix a broken LED light?
Now the LED lights are broken, most of them are caused by a certain or several patches are broken, and there is almost no way to repair them, only a few groups of broken ones, and a few groups of new ones.
Turn off the light switch in the living room, close the main switch, and see what the other lights are doing.
If you don't understand the basic knowledge of electricians and electronics, it's still okay, and it's not expensive to buy a new set.
The life of the LED lamp is very long, if the lamp bead is broken], the cause should be identified, and after the cause is found and the symptom is solved, the damaged lamp bead should be replaced with the same lamp bead, so as to ensure that it will not be damaged again after replacement.