Difficulty
Difficult
Steps
6
Time Required
10 - 15 minutes
Sections
1
- micro-switch
- 6 steps
Flags
Member-Contributed Guide
An awesome member of our community made this guide. It is not managed by iFixit staff.
BackLogitech M720
Full Screen
Options
History
Save to Favorites
Download PDF
Edit
Translate
Get Shareable Link
Embed This Guide
Notify Me of Changes
Stop Notifications
Introduction
This guide takes you through the process of disassembling your mouse and replacing the micro-switches, making your mouse as good as new!
What you need
Step 1
Dissembly
- Begin disassembly by removing the battery
- Peel off the sticker underneath the battery to reveal the small Philips screw underneath. As my particular mouse had already been disassembled, the sticker is not shown in the images
- Using a flat blade screwdriver or similar instrument, peel off the rubber pad at the upper edge of the mouse to reveal two more screws
- Unscrew a total of 5 Phillips head scews as marked
Begin disassembly by removing the battery
Peel off the sticker underneath the battery to reveal the small Philips screw underneath. As my particular mouse had already been disassembled, the sticker is not shown in the images
Using a flat blade screwdriver or similar instrument, peel off the rubber pad at the upper edge of the mouse to reveal two more screws
Unscrew a total of 5 Phillips head scews as marked
1024
Step 2
Separating top and bottom housings
- Gently separate the top and bottom parts of the mouse, being careful not to pull the two parts too far apart, so as to avoid damaging the small ribbon cable that connects the switches on the top housing to the main board
- Un-clip and remove the ribbon cable from the main board as shown. The two parts of the mouse are now separate
Gently separate the top and bottom parts of the mouse, being careful not to pull the two parts too far apart, so as to avoid damaging the small ribbon cable that connects the switches on the top housing to the main board
Un-clip and remove the ribbon cable from the main board as shown. The two parts of the mouse are now separate
Step 3
Removing scroll wheel assembly
- Remove the clip holding the translucent scroll wheel assembly to the black plastic piece
- Lift of the scroll wheel assembly, making sure not to loose the two small springs underneath, towards the front. The springs were already missing in my mouse, but I have marked the location in red
- Remove the two screws holding down the black plastic piece, to which the scroll wheel assembly was attached
Remove the clip holding the translucent scroll wheel assembly to the black plastic piece
Lift of the scroll wheel assembly, making sure not to loose the two small springs underneath, towards the front. The springs were already missing in my mouse, but I have marked the location in red
Remove the two screws holding down the black plastic piece, to which the scroll wheel assembly was attached
Step 4
Main board removal
- Lift off the main board and place it gently to the side, taking care not to damage the remaining ribbon cable attached to a small switch and bracket assembly on the bottom housing
- Unscrew and lift off the metal bracket. The ribbon cable and small piece of PCB at it’s end should now be free
- Make sure not to loose the small plastic on-off slider switch cover, which should now be free to fall out if the bottom housing is turned over
Lift off the main board and place it gently to the side, taking care not to damage the remaining ribbon cable attached to a small switch and bracket assembly on the bottom housing
Unscrew and lift off the metal bracket. The ribbon cable and small piece of PCB at it’s end should now be free
Make sure not to loose the small plastic on-off slider switch cover, which should now be free to fall out if the bottom housing is turned over
Step 5
Desoldering micro-switches
- Identify and de-solder the micro-switch solder pads using your preferred de-soldering method, such as a solder pump or de-soldering wick. Your soldering iron tip should be clean and properly tinned, unlike my atrocious tip pictured here
- If required, pry the old switches off with a flat-blade screwdriver while applying heat to the solder pads
Identify and de-solder the micro-switch solder pads using your preferred de-soldering method, such as a solder pump or de-soldering wick. Your soldering iron tip should be clean and properly tinned, unlike my atrocious tip pictured here
If required, pry the old switches off with a flat-blade screwdriver while applying heat to the solder pads
Step 6
Switch replacement
- Install and solder the new switches
- Again, be sure to use a correctly tinned and clean soldering iron tip. Your tip should not be as gnarly as mine is in these pictures
Install and solder the new switches
Again, be sure to use a correctly tinned and clean soldering iron tip. Your tip should not be as gnarly as mine is in these pictures
To reassemble your device, follow these instructions in reverse order.
Cancel: I did not complete this guide.
3 other people completed this guide.
Author
with 4 other contributors
Santaji
Member since: 03/25/2011
802 Reputation
4 Guides authored
Badges:
8
+5 more badges
John Travolta - Sep 25, 2021
Reply
Next time show ALL screws, type and position.
On this mouse screws are not all similar and if somebody forget that your “guide” don’t help
The_Rural_Juror - Jun 11, 2022
Reply
Thanks for the guide! It helped so very much.
ted - Jan 4, 2023
Reply
thank you! i only needed to open and clean the dust inside and it clicks well again.mine was double clicking when i click and hold.was about to unsolder and swap the left and right switches but didn’t have to go all the way there.screws are fine i think. just be careful and put them on a safe place with the same relative positions to make it easier to put back, as with all other devices when disassembling
