Introduction
The Logitech Mouse, model 205, isn't as clear to take apart as later models. But once the steps are known, a teardown for this device is straightforward and requires only common tools. This guide will instruct the reader on how to take apart this particular model.
Tools
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To remove the battery, turn the mouse over onto its back and press the square button bellow the battery icon.
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Pressing this button should release the cover on the top of the mouse, allowing you to remove the battery.
 
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Flip the mouse over onto its back.
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Using a metal spudger, scrape off the padding on the bottom two pads as shown.
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This will reveal a two holes, with a screw in each.
 
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Using a phillips head screwdriver (J000 in ifixit toolkit), unscrew the screws holding the base in place.
 
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Lift up the back side of the mouse, then gently slide the front towards the back.
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After sliding, then the mouse will open as shown.
 
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Using a phillps head screwdriver (head J000 in the ifixit toolkit), unscrew the circuit board from the mouse frame.
 
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Using the tweezers, gently pull the circuit board from the mouse. Hold the circuit board by the metal frame that surrounds it, as shown.
 
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5 comments
Logitech M180 opens the same way.
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I don’t quite understand the point of this. The mice fail occasionally but are inexpensive (~$15). It would be nice to be able to repair them but merely disassembling them doesn’t serve any purpose as far as I can see.
I would like to be able to open my mouse to see why it's not working all the time and I suspect it's because some kind of liquid or goo got in there. Maybe I can clean it.