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Disassembly Instructions for Microsoft Optical Mouse

This short guide gives some information about how to disassemble the Microsoft Optical Mouse in case the wire is loose or if you want to replace the LED or clean the mouse thoroughly. It's about a white model, but there's a gray and blue model also available, and they're the last mouse released before the IntelliMouse.

Regardless, here's how it should be disassembled as other ways can damage the casing of the mouse.

Step-by-Step Computer Mouse Disassembly

1) Check your model - if there are 4 black pads, remove the bottom two and unscrew both of them.

2) Pull the case up, and insert your screwdriver inside, and pry the case open. Don't worry about damaging the case, as there is only plastic clips at the top in this model, and they unclip straight away.

3) Once you get to around where the wire entry is, the case will just pop off.

4) Pull the wire in past where it was previously pinched, and then once it's in tidily, clip the wire back into the right-hand side of the case.

5) When you're placing the case back on top - use your screwdriver to hold the wire in the top-right of the case and then push the case down hard.


If the mouse pads aren't making a noticeable click, then you haven't pushed the case on hard enough. Push down and keep checking the pads until they click.

To stop the mouse from dropping on/off due to the wire being loose, get a little bit of blue-tac, and push it over the area of the wire that was faulty then when pressure is applied, the wire doesn't move around inside the case and jar the connection.

It's advisable to have the mouse plugged in to the computer so that you can move the wire around to see where it's not making a connection, but you have to be very careful.

Take Apart Pictures

  A picture of the mouse itself for those who want to identify if it is the same as theirs.

  A picture of the underside of the mouse. Because I wanted the light to be much more luminous, I removed the sticker so that there could be at least a little more light visible from the thing.

  The location where the screwdriver should be moved up to once the bottom part of the mouse has been unscrewed. If the person were to apply force here whilst holding the bottom of the case open, it would result in the clips at the top of the mouse being unclipped from their position.

  Opening the case after the bottom screws have been taken out.

  View of both halves of the mouse casing - the main wire connected near the bottom-left of the circuit board.

  A view of how you can cheaply use rolled up paper to keep the wire in place to prevent the circuit from being broken.

  Another solution of ensuring the wire is kept in place. Cheap but it works.

Other Resources

Disclaimer and Credits

Warning: These instructions are given without any warranty. They don't have to be complete or correct. Don't do any of the following steps if you're not sure of what you're doing. You could damage your computer mouse and you WILL lose your warranty. Everything you do will be at your own risk.

This document is a courtesy made by Jordan Craw for Repair4Mouse.


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© Werner Heuser 2005-2009 · · last change Sun May 25 2008