Instructables
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I have a Logitech wireless laser mouse and after a year or so of use, the left click button would double click every time I tried to single click something. As can be imagined, this gets frustrating very fast. So, being the tinkerer that I am, I decided to open her up and see if it could be repaired. Sure enough, It's a pretty simple fix, if you have some common tools and a teaspoon of patience. There are some very small parts involved, so you will want to make sure you ware working in a well lit, clean environment so that any parts that are dropped can be easily found. I have now performed this fix for the third time and decided to take pictures this time to share with others who may find this useful. Each time the repair lasts about 6 months to a year before needing to be redone. I imagine at some point the piece causing the problem will break, at which time the mouse will need to be replaced (unless you're determined enough to try and source parts). Good luck with your repair, I hope this helps.
 
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Step 1: Remove batteries

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If you are working on a wireless mouse, you will want to first open the battery cover, and remove the batteries from the mouse.

Step 2: Access screws

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On this particular model there are four screws which hold the mouse body together. These screws are located underneath the slide pads on the underside of the mouse. To remove the slide pads, gently pry the edge of the pad up with a small flat head screwdriver and peel it off. They are held in place with some sort of adhesive.

Step 3: Remove screws

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Remove the four screws with a small philips head screw driver.

Step 4: Open her up

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At this point the top cover should lift off, revealing the mouse's innards.
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I registered only to be able to add this comment: Man!!!!! You deserve aaaall the good in this world! I saved $150 in 5min. Not to mention that I was fighting this issue for months! I can't express how grateful I am. Thank You sooo much.

gbowdeniv20 days ago

Thanks for this! Really good info to have! I just repaired my mouse and it's better than ever! :D

artimis36d made it!26 days ago

Thank you very much. It took me around 15 mins to complete the fix (on a second attempt).

Actually
you just need to increase the strength of the curved part (the spring),
so you can use a steel rule or whatever to slightly flatten the curved
spring, then put it back on the contacts.

After you flattened the spring, it will be harder for you to put it back on the tiny switch.
I don't have tweezers with me, I used a pair of nose pliers to put the spring back in place. My mouse is like new again.

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mdciotti1 month ago

Thank you! After about 30-45 minutes of tinkering, this solved my problem that I've had with the past two Marathon M705 mice. Both were given to me as replacements for defective Logitech mice, but unfortunately my warranty finally ended and I could no longer get another replacement for this defect. I resorted to switching to the right mouse button as my primary for a while, until I stumbled across this guide. Once again, many thanks!

jdmunguia made it!1 month ago

Awesome after 1 hr 30 min it work.

Thanks

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fixdatmouse1 month ago

Great job ! I have 3 MX705 Logitec's . One is very similar to yours... and I fixed accordingly. And yes that spring is difficult but very doable.

My other MX 705 has a greenish button housing and the "snaps" are on the sides. The spring looks like it is made out of "tin" as compared to brass or copper as in your demonstration. The button housing is harder to get off... looks less durable, and the "tin" spring also looks "cheaper" . Oh well... so it goes.

Thanks... I do like these mice and their functions... and you definitely saved me $50 for a new one. Although with the "cheaper construction" of the button on the newer MX 705... Logitec may have lost any of my future business in mice.

Great job on this instruction, and anybody reading this should read through all the posts to get any tips they can get to get that darn springy thing back in ! :-)

waoooo it was just toooooo good...

where was you i have thrown 5 mouse because of it i didn't know this :(

but now i know how to dealt with them thanks a lot :)

And you know I just Sign Up to site to Thank you. :)

Can I ask what the part number is for the microswitch? I'd rather just buy a replacement switch and solder it in than mess around with this.

thxthx!

0x33b5e52 months ago

Sweet, just repaired my Logitech M310! I was getting fed up with the random double-clicks and nearly threw it out until I found this. It took me around 20 minutes, but most of that time was spent trying to get that sly little tension spring back into place. Thanks for this guide! I've already bought a new mouse, but this M310's as good as new and now I have a backup.

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athavare2 months ago

Thanx a lot man......that last step really is a pain...but works like charm.....thnx :)

mclmatty2 months ago

amazing! really works. mouse clicks like new!

saved my bacon here, thanks :)

Rocksack3 months ago

Woohooo! After ~2 hours i finally got it :D

Doesn't click anymore, but it works.
Thanks for the instructable!

ydoucare3 months ago

Notice how most of the comments here refer to Logitech mice? I did this "procedure" to the left button on a Logitech Performance MX (I have a total of 4 Logitech mice with this problem) and it seems to have helped, but not sure that it completely solved the problem. It took a good hour of fiddling with the spring to increase the tension while still being "clickable". Eventually, I got it pretty much perfect. It is now has noticeably more tension than the right button. While much better, it still suffers from an occasional double-click or will let go when dragging.

Meanwhile, we have over 100 cheap OEM Dell mice out in the wild that pretty much never exhibit this problem. I have another Performance MX along with an M705 here at work with the exact same issue. At home, I have a Logitech G700 with the same issue. Why is Logitech STILL producing mice with this problem?

devans333 months ago

Finally! Had to post my findings in case it may help someone as it was driving me INSANE!!!

Took me over 2 hours I reckon to get the tension spring back in correctly. First time I thought I had it, when the cover was back on there was absolutely no click. Second time was a very faint click. Third time nothing again. Fourth time same as second but even fainter.

Each time taking a good 20-30 minutes. Was seriously about to give up, getting all hot and annoyed! I tried all the different techniques, coming in from the side, hooking the middle then the end one, none worked for me.

What worked for me was sliding the end bit with no hole into it's gap, then making sure the middle bendy bit was above it's hook, pull whole thing so the other end clips into place. Time and time again it would go to far, the clips they hang onto a so tiny I can't even see them, you just know when it's on because it doesn't pop off and it's almost flush with the top of the metal. With the ends in place, I then pushed the section the white button pushes down as far as it would go. This exposes the middle bit nicely and holds the whole thing in place securely. Then with my thumbnail, very very carefully push the bendy middle bit down until you hear a TINY click (could maybe do this with a very very small screwdriver). Again, push too hard and it goes too deep and you have to start all over (trust me this WILL happen lol). After that tiny click you should then be able to press the section the white button pushes down on and get a nice solid click without the whole thing pinging off or sliding down.

I now have a perfect left click again. If I hadn't managed this I would have got a new micro switch and soldered it in rather than pay for a new one as they are exceptionally expensive mice!

Good luck! It is as frustrating as hell!

Oh and thanks for the original article :)

Thanks. It was driving me crazy. Now its clicking easy and quit. Fixed my old 4 year old logitech cordless mouse. Saved 40 bucks.

jrothermel5 months ago

Before you take the copper spring out, which is gonna be a hassle to get back in, see if this doesn't work first. I've found that the spring may not be what the problem is. Once you take the case off of the mouse, just blow into the left mouse click case and test it to see if it starts clicking properly after that. I was about to take the copper spring off, but after taking the left click casing off and simply blowing into it, it started working like normal again. I guess it just gets dirty and messes with the contacts which causes double clicks and such. Hope this helps and good luck!

mwistrom5 months ago

I could have figured out how to bring my mouse back to life without your information, but I would have had to open it up about three times.

This made it easy.

Thanks for the write up.

privatier1 year ago
I solved the problem by soldering a 820pF capacitor across the active terminals of the microswitch.

As an EE student, I'm wondering what you mean to accomplish by doing this...?

The capacitor reduces bouncing of the microswitch.
dmiranda86 months ago
I cant believe it worked. After some yelling and time I finally got the damn copper piece into place. THANKS!
navillus6 months ago

Thank you sir! I found a pair of hemostats very helpful. I've been dealing with this for a year plus, crazy annoying!

stevenr216 months ago

I took my mouse apart and instead of tearing into the switch, I just sprayed contact cleaner on the white button. I depressed the button while spraying to ensure it wicked inside. I then clicked the button 20 or so times in rapid succession and it is good as new! I suppose you could take the cover off the switch to get the cleaner all over but my mouse is still working weeks later without it. If your pads need to be replaced, you can order replacements for $10 or so.

To the author: thank you! It took me about an hour, with reading glasses and a magnifier, and I had to remove the cover on the other mechanism to get a better look at it, andi tried so many different ways to get that spring back in that I can't remember what finally worked. But I wish I had read all the comments first-- next time I'll try blowing on it first! I kept doing the math-- a $60 mouse that lasted just a year costs way too much at $5/month. I guess I could live with $2/month, which means having to repair it at least once more. Maybe I'll try soldiering in a new switch next time.

So satisfying to fix something good as new rather than throwing it out, and then being able to share my success with folks who get it.

wimbuh made it!6 months ago

Spended half an our on it. With a screwdriver and a patato cutter. And recycled my performance MX :) A minimal hourly rate of 108 euro where I can buy a new one for 54 euro ;)

Also made a account primarily to compliment this tutorial.

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paulsykes6 months ago

performance MX back up and working again. Many thanks for the info.

iheggie6 months ago

Oh, buy the way - I suggest you put your finger over the box whilst levering it up ... That little white button was rather hard to find once it had flown off and bounced back under a table !! :-)

iheggie6 months ago

Worked a treat with Performance MX - I had problems selecting large area with click and drag (it seemed to add an extra mouse up/down at times). Some comments, in case it isn't obvious:

  1. The front and middle curved springs sit in slots, not further down under the tabs. I ended up uncovering the right mouse spring so I had a comparison (I took some pics with my iPhone as close as it would focus and zoomed in after my first attempt failed).
  2. There is a tab under the left "wing" (change windows) button on the performance MX - I carefully wiggled to remove, and press together gently until it clicks in to assemble.
  3. I removed the wiring between the top and bottom halves to make it easier - just unplug the connector (the MX has 4 buttons and some lights in the top shell).
  4. A pair of reading glasses (1.5x) helped me focus that bit closer.

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randyocampo7 months ago

Wow!!! Thank you very much!!!

Now I can use my mouse with ease. and also I fix my other mouse, now I have a reserved mouse.. thank you very much!!!!

matroska7 months ago

A G5 with many, many years has been saved with this procedure (first generation, single back button).

I did screw up a little though and now it won't have feedback (hear/feel the click) - but once I got used to it, it's like stealth mode.

I also ordered off ebay the same microswitch - Omron model D2FC-F-7N(10M) - very common among Logitech mouses. Soldering the new component should prove to be a more reliable fix (as I did break the feedback after fiddling too much). With knowing there is a supply of these, these Logitech mouses might indeed live much longer than expected.

ctouesnard7 months ago

Thank you for this, my mouse's inability to move a window or drag and drop text within a document had become unbearable. This was actually easier than I thought and I completed the fix and reassembly on my Performance MX mouse in less than 15min.

My only issue was the reassembly of the spring as I did not take sufficient notice of how the spring was mounted when I took it out and had to open up the other side to figure it out.

Thanks again!

krial7 months ago

Every Logitech mouse I've ever had has had this problem. I've had at least a dozen of the $8 cheapies at Walmart, and they usually start double clicking within 2 months. I'm currently running a M515 Couch Mouse on one computer (started double clicking after 6 months) and an MX Anywhere (double clicking after 1 month) on another. Extremely irritating.

As much as I love most Logitech products, their mice are just ridiculous when it comes to double clicking and I'm not sure why I keep buying them :(

andrew_berge7 months ago

Yessss! You just saved:

My Performance Mouse MX

My $70.

My sanity. This problem was driving me nuts. Thanks!

darkcheops8 months ago
Did this with my MX Revolution and getting the spring back in was a pain in the ass but it works now. Thanks, you saved me 60$.
csheng18 months ago
Hi, thank you very much for the great tutorial - I've tried it and my mouse is working fine. May I suggest that for step 8: Reinstall tension spring, you (1) place the curved tab (which is in the middle of the spring) at an angle on the tiny ledge of the metal piece on the mechanism first, then (2) hook the spring onto the front part of the mechanism, before finally (3) sliding the spring beneath the rear part of the mechanism?

I did not have much luck with the original action series of 2-1-3 until I tried 1-2-3 and the whole spring just slid into place while pivoting on the middle curved tab.

Hope this helps. And once again, thank you!
haidang93nd9 months ago
Great tutorial...
Btw, have you tried using RP7 to clean that button without opening it up?
Great article and excellent instructions!
i had the same issue with my mouse , only i didn't think about repair the mechanism itself , i just replaced the entire button. check it out :
http://www.benshardwareblog.com/laptop-hardware/fixing-wireless-mouses-buttons
RichardeM10 months ago
Thank You very much for the work involved in this..
Just saved me from throwing mouse out the window, which now works perfectly.
Just one point I would add.
The slots the spring contact fits into on the two posts are really very tiny.
I found the best way to get it to fit back on was to hold the front of the spring in a tiny but grippy pair of instrument tweezers, fit the bent spring to the Middle post slot first and then gently pull the spring forward until it just slipped over the Front post and into the slot.
eibarra211 months ago
THANK YOU SO MUCH MAN!!!!!! just saved my razer naga 2012 :)
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