problem with meijiu max 650 lamps

Hello everyone, I have a problem with two meijiu max 650 lamps. I have only used the lamps for the second time, even though they were bought almost 2 years ago. When asked about this, the manufacturer claims that it is because I rarely use these lamps that they have stopped working properly. As you can see in the pictures, whole rows of diodes do not light up. Has anyone encountered anything like this? I would be grateful for any tips because I would hate to throw these lamps away and sending damaged drive strips from this manufacturer is very expensive. Best Regards, Alba007

My advice is to use them as is or try to get something sent out by meijiu to replace the pcbs yourself, hopefully under warranty.
Ive bought several meijiu pcbs and never had problems with them after just a couple of runs. But they do eventually get spent and break down.

Right now it seems like the market is gearing everyone for ever more cheap lights which doesnt really mean quality is in focus, nor by manufacturers nor consumers.

If you cant get a reasonable solution from meiju id suggest trying to quantify light loss under broken parts, see if its worth it to you running them still, and either just running them or buying something new.

I always suggest DIY cause what you can build you can also repair yourself, and if you buy a couple of spare pcbs youre covering yourself from failures. Its really problematic claiming warranty on any of these lights as you may be stuck with costs of sending it back to china which is often more costly than replacing.
Make sure you get any components that may break down from an outlet which has a actionable warranty.

Thank you very much for your answer. Unfortunately, the manufacturer claims that the warranty for their lamps is only 1 year. In my country, the warranty is 2 years, so if I bought them locally, they would be replaced or repaired under warranty. I also noticed that several of the damaged LED rows start to light up for a moment after pressing with my finger, so there is hope that it is actually just a connection problem. However, how can I check where the electrical path has a break? Is there a device with which I could trace each path where the current stops flowing? I will honestly say that after the situation with these lamps and the manufacturer's approach, I will probably never decide to buy lamps from China again because this is a joke, for all the LED strips (only LED strips without a supporting structure) with delivery, the manufacturer wants about 450 USD, which is an astronomical amount for me. In reality, only two or three of the strips are not damaged, but I would take them as a spare or even more spares because the shipping cost is shocking.

Yeah, im not buying any cheapo bar lights in china. Dont mind buying pcbs if i believe in the manufacturer.
I assume your in EU region? Miejiu has EU warehouses but if you bought it shipped from china its whatever warranty they say. And even if you had EU warranty it would also be a case of making them act on it.

I still dont believe all china stuff are bad, but usually people tend to buy china to make savings and savings always comes with some type of costs involved.

That's right, I live in the EU. Unfortunately, the LED bar would be shipped from China. It's a shame that when buying these lamps I didn't think about ordering spare parts at the same time. I was convinced that there wasn't much that could go wrong with such a lamp, and I'm even more surprised that it happened after 6 months of use in optimal working conditions.

I probably bought the cheapest version of this lamp and I got what I paid for. Thank you for your help and if anyone has a way to quickly and cheaply fix the fault that occurred in two of my lamps, please help.

alba007 said:

That's right, I live in the EU. Unfortunately, the LED bar would be shipped from China. It's a shame that when buying these lamps I didn't think about ordering spare parts at the same time. I was convinced that there wasn't much that could go wrong with such a lamp, and I'm even more surprised that it happened after 6 months of use in optimal working conditions.

I probably bought the cheapest version of this lamp and I got what I paid for. Thank you for your help and if anyone has a way to quickly and cheaply fix the fault that occurred in two of my lamps, please help.

Click to expand...

España?
For a fix its hard to say. If you are able to get the lines to light up by pressing or mechanical force there may be something you can do; doesnt seem like the diodes are gone. Id ask @Prawn Connery for advice but i believe he doesnt have much time for this forum anymore. @Jonesfamily7715 and @Absorber are clever and technical but its very hard to say without first hand experience of whats going on. Maybe close ups, or even a videoclipp of what you do to get things working again could help but youre likely the one with best view on what could work as you have the first hand experience.
Check comparative light levels to evaluate if these dead diodes actually have a huge impact. I dont think you should throw everything away. There is always ways of salvaging something, maybe by using the structure and driver and applying your own pcbs. But if 450usd is an astronomical sum youre likely to have a hard time getting new pcbs for two lights.

If you ever find yourself interested in the DIY process, which pretty much means that you can fix anything you can build please dont hesitate on hitting me up on pm. Y se habla español

A picture of the board would help, I've mended circuit boards with single copper strands soldered across breaks but I'd need to see what you're working with, if there's room to solder on the track there's room to repair?

alba007 said:

I also noticed that several of the damaged LED rows start to light up for a moment after pressing with my finger,

Click to expand...

Where are you pressing with your finger?