iFixit - Answers With Device "Logitech MX Master 3S"

Logitech MX Master 3S: Side button switches? which are used, which do you suggest?

Sun, 23 Nov 2025 11:18:19 -0700

Using the top side button as a middle mouse click, the switch is wearing down, which switch can I replace it with?

Logitech MX Master 3S: MX Master Left Click Replacement?

Fri, 14 Nov 2025 08:28:41 -0700

Using an MX Master 3s - need to fix/replace my left click switch or spring. Can someone point me towards my options? Whatever is easiest is best. I don't really want to deal with soldering, but buying a new $100 mouse also seems out of the question.

⟐ Edited November 14, 2025 at 8:28 MST

Logitech MX Master 3S: The device is un-responsive

Sat, 12 Jul 2025 14:48:04 -0700

The device become unresponsive without any pre failure notice, I have disassembled it for further check and reading is as follow

The battery charge is 4.1V

When cable is connected the battery slot shows 4.5V with the battery discounted

Even though no singe led shows sign of life, and no connection or status on the back side shows sign of connection

Any suggestions to repair

Logitech MX Master 3S: Can't get the ribbon cable in

Mon, 09 Sep 2024 14:34:44 -0700

The lock broke and I can't get the ribbon cable back in. Am I screwed? The cable came out super easy and nothing had broken. Trying to get it back in has been like wrestling an eel. The lock fell off and the ribbon cable won't slot in no matter what I do. I can get the lock back in without the cable and it stays. Can't get the cable in though.

The idea of do it yourself repairs is a nice idea, but nothing stresses me out more than ribbon cables and jst terminals.

Logitech MX Master 3S: Following the fall, all the extra buttons have stopped functioning

Wed, 20 Mar 2024 04:23:12 -0700

shift wheel mode, horizantal scroll(thumb wheel), back button, forward button, gestures not working After dropping it to the ground. Is there a solution for this?

⟐ Commented March 20, 2024 at 4:23 MST

Logitech MX Master 3S: Mouse Not Working Correctly

Thu, 24 Aug 2023 17:26:04 -0700

I accidentally dropped my mouse on a hard surface. Once turned on, the magnetic release to allow the scroll wheel to move freely doesn't work and disconnects the mouse from my computer. It also gets disconnected when I press the top button to change the scroll wheel setting. Does anyone know what the problem may be and how to fix it? TIA