How to Repair Chinese LED Lightbulb




Cheap, Chinese, and not working. This is one of the few situations where two out of three is better than ain't bad. I order these from Ali Express for a couple dollars. I knew something could be done creepily seeing that some would fail only a few months after getting them. most of them are assembled with inexpensive easily obtained components.

Step 1: Assess the Situation.

First, remove the diffuser lens cap. Most of them screw off, but this one pops off like an Easter egg. Using a standard digital multimeter set to diode, and paying attention to polarity, I check each LED for light. If one doesn't light up, double check polarity, of it still doesn't light up then mark it with a Sharpie for removal.

Step 2: Removal.

The LED is easily removed using a small blade to apply gentle prying pressure, and soldering iron tip. You w will likely see almost no thermal paste, which lead to the LED failing in the first place. don't forget to dab some thermal paste on the heat sink.

Step 3: Installation Is Reverse of the Removal.

Your heat sink still has enough solder on it to finish the job. Hold LED in place while you heat each contact, reattach lens, and you are good. I only saw one in a dozen that have a bad power supply...those will have to wait for a day when I have more time. thanks for reading.



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    4 Discussions


    3 years ago

    I didn't understand exactly what you did... Did you just remove one LED?

    2 replies

    Reply 3 years ago

    Yes, then put a working LED in it's place. be gentle, it's my first instructable.


    Reply 3 years ago

    Ohh, Now I understand!

    I've just seen in most cases that the transformer is what burns itself out and then the LED bulb doesn't work. In your case, If an LED failed then that's obviously what you have to do... :)


    3 years ago

    Nice repair. Thanks for sharing!