How To Fix the Infamous Logitech Double Click Problem

M510

The Logitech M510 was released in 2010 and is a cheap wireless non-gaming mouse, which runs off two AA batteries. I do not own the mouse in the photos below, but it seems to be well made from the short time I had with it. Except for the switches, of course. This mouse is very simple to repair, compared to the other mice in this article. You do not need to remove the feet to open this mouse.

To reach the internals of the mouse, we need to separate the top and bottom halves. Flip the mouse over and remove the battery door, batteries, and USB wireless dongle.

Logitech M510 before disassembly

Batteries and USB wireless dongle removed

Two screws are holding the halves together, and they are hidden under the battery flap. Use a Phillips #1 screwdriver to remove them. Starting from the battery compartment, pull the two halves apart. It will take more force than you expect.

Screw locations for the mouse

Split the casing starting at the battery compartment

With the mouse split, set the top half aside. Next, remove the scroll wheel assembly by pulling straight upward. If you accidentally removed the scroll wheel spring, I’ve included a photo to show how it is installed.

Mouse split in two

Scroll wheel assembly

Closeup of the scroll wheel showing the spring install location

Remove the battery cable connector from the board. This connector has small latches, so you can’t pull it straight out. To remove the connector, slip in two flat-blade screwdrivers between the housing and connector, then pull the connector out. The arrows show where I slipped in the screwdrivers. Then, remove the lone screw holding the board, opposite the battery connector.

Battery connector with arrows showing where to slip in a screwdriver

Lone screw holding the down the board

With the screw removed, the board is being held in by two latches. Carefully push the latch away from the board while pulling the board up. Once the board is passed the latch, do the same on the other side. Pull the board up and out to remove it from the mouse casing. The optical sensor is part of the board assembly, do not remove it from the board.

Latching holding the board down

Latching holding the board down

Board removed from the bottom casing

With the board removed, replacing the Omron switches is easy. Remove the old ones and solder in the new ones. Once the new switches are installed, verify the scroll wheel sensors are parallel, like in the first photo. The sensors are between the Omron switches; one is black, and the other is white/clear.

Old Omron switches before replacement

New Omron switches installed

Before installing the board, we need to reinstall the power switch. It will go in backward, but it will be stuck. In the second photo, note how the orientation of the switch tabs are compared to the rest of the casing.

Power switch

Power switch properly installed

Install the board, and push it down to clip it in. Reinstall the battery connector and the screw on the other side.

Reinstall the board into the mouse

Lone screw holding the down the board

Battery connector

Reinstall the scroll wheel assembly. Clip the two halves of the mouse back together, then reinstall the screws in the battery compartment. Verify the mouse works, and you are done!

Scroll wheel assembly

Screws in the battery compartment