Logitech M500 laser mouse (repair)

Last week the left mouse button of my beloved Logitech M500 laser mouse stopped working correctly. The mouse is several years old and used daily for several hours, so there is no reason for me to be unhappy with it’s endurance. But replacing a mouse, because of a single worn out switch, felt like a waste. That’s why I decided to repair the mouse.

m500

Unfortunately I could not find a service manual on the Logitech support site. That did not stop me, oh no, on the contrary! I got enthusiastic and documented the process, so this will be much easier for you to repeat.

The “missing” Logitech M500 service manual

This post will show you what the inside of a Logitech M500 laser mouse looks like. It also explains where the screws are located and how you can remove them carefully. It should be possible without destroying the mouse, but I take no responsibilities for your actions. If your mouse is still under warranty – which is a generous period of 3 years – then I urge you to stop reading and contact Logitech support to get your mouse replaced.

m500_bottom_screws

The 4 bottom screws are located underneath the feet or “skates”. The skates are oval stickers and can be removed without too much damage by using a sharp knife. Slide the knife underneath the entire skate to peal it off in one piece. Do not fold or bend the skates as shown on the picture unless you plan to replace them. A replacement set of 4 skates can be bought on-line and cost about 5 dollars.

m500_remove_wheel

The cable of the mouse can easily be removed, because it is connected with a plug into a socket. Pull the plug out gently by wiggling it. You can then remove the wheel by pulling out the “f”-shaped axis (shown in the inset) that is located in the middle of the mouse (see circle). On one side it has a little handle that you can use to gently pull the axis out. After doing that you can pull the wheel structure upwards from the front of the mouse as indicated in the picture. You may need to pass a little aluminum strip that keeps the wheel structure in place.

m500_screws_inside

Now we can remove the main board of the mouse which is kept in place by 5 screws that are marked in the picture. Easy ain’t it? If you need to replace a left or right mouse button switch the model is “OMRON Micro-switch D2FC-F-7N” as you can see below:

m500_omron_d2fc-f-7n

Their 3 pins can easily be (un)soldered on the main board. You can buy this OMRON micro switch on-line for about 1-2 dollar per piece.

Happy hardware hacking.. 😉

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9 thoughts on “Logitech M500 laser mouse (repair)”

  1. Do you know if the cable is the same as with the logitec g500? Mine broke at the usbpart (which goes into the laptop). I’d like to replace it but on ebay I can only find cables for the g500.

  2. Thanks for the pointer with the f plastic thing. I only have to add that there is a very small spring that goes from the acrylic pin below sw13 to a matching hole on the underside of the wheel assembly.

  3. @mnt: Awesome details, thank you. I hope it helps somebody!

  4. Why is this mouse so heavy? I have one and I would love to make it lighter… so is there any additional metal inside that I could remove in order to make it lighter?

  5. @Antony: Yes, I there is a small metal weight that is screwed to the top cover of the mouse and can be easily removed (tightened with a screw). Unfortunately I did not capture that on the picture. I hope this comment helps you.

  6. Hi, thanks for the tip, but as my problem is different, it did not help. my M500 is detected, the clicks and scroll work fine, but the pointer will not move. I suspect the laser chip is defect. No reference for that chip and anyway I guess it’s expensive as it’s most important part of the mouse… thanks anyway 😉

  7. My beloved red Logitech LS1 laser mouse suddenly acted weird: I was single-clicking folders but they were opening as if I had double-clicked and programs began popping open as I tried to move shortcuts around on the desktop. Thanks to your excellent tutorial I was able to open my mouse and yes: the Omron D2FC- F-7N switch was a bit lazy…Well, I could buy online 20 switches for 5 euro the lot and free shipping. But I hesitated. The micro soldering scared me off. So I reassembled my beautiful red mouse to put him on display. But guess what? The problems were gone! Well, not for long, I suppose. But still: I am very grateful to you. It feels great to be able to repair something you love -whether you do it or not!

  8. @Lia: Thank you for commenting. I’m glad the post helped you, good luck with the mouse!

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