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Repair guide, disassembly, and troubleshooting information for the Logitech MX Master 3S wireless mouse. Released in 2022 and identified by model number MR0077.

Cannot click left button

I bought this gear for around 1 year but it seems broken. I cannot click right properly. I have to click multiple times to complete the task.

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Many people, including myself, have the same issue. The button switches are low quality and work for a few months. Then start working intermittently. Logitech are aware of this issue and do nothing. There are no replacement switches offered here or instructions for replacement (requires soldering).

Personally, this is the last time I'm investing money in Logitech.

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Same for me, poor form for an expensive product and only after 14 months

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Same here, warranty of two yrs just over.

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You have to replace the switches inside. My mouse lasted 2 years before the switch broke.

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There is a known issues with the switches that were used for these models. I tried the tape method, so my click could more easily push down on the switch, but it's better to try replacing the switches that don't work.

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Hi, I have the same problemn, but on my case,The mouse is unable to fully drag the selected icons. I Don`t know what happenned.

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not the same issue - create your own thread.

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Would say its the same issue. its an issue on the switch under the left button of the mouse. Would be solved by replacing the switch. Which is what i did on my mx master 3s

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I have the same problem..the left click works 50 percent of the time...and because of that..we won't be able to drag all the files or select them.

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Same issue. I own MX 3s less than 10 month and faced with this problem

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Similar problem here. My left click started misbehaving after 3 years - I have to click harder than usual for the click to register. Very disappointing with a mouse this expensive :(

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In this case, the only thing I can see is that click left button is broken.

  • If this item is still under warranty. It's best to make an insurance claim right away.
  • If you want to fix it yourself. Replace it with a new mouse switch. Require soldering skill (Make sure is the same item as your mouse)
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where can i buy those parts?

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mostly you can buy it from online shopping.

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Pudieras adjuntar alguna pagina de donde encontrarlo ?

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Oh, man, need another switch ((

On your pic don't Logitech MX Master 3S

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The switch shown is wrong. The original part number is EVQ-P0D07K. This part is more clicky but may last longer: EVQ-P0E07K. Kailh Mute Button 6 * 6 * 7.3mm may work as well.

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Same stupid problem exactly after 1 year so that its not covered under warranty, i guess they intentionally made it for one season.

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I had the same issue, I got some HUANO Yellow mouse switches from Ali Express about a year ago and they have not had any issue and sound way better.

From what I can tell, this is a common issue in the Logitech mice with their switches. I'm not sure about newer models but all the ones I have owned have had issues with the mouse switches after a year or two.

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My biggest issue with the 3S, 2S and any other mouse is dirt accumulation.

Check under the levers and clean out the optics.

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I somehow doubt that "cleaning the optics" will fix their issue with clicking... :)

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Nack Napat 将永远感激不已
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