DIY computer mouse repair logitech.

Device overview

Dear visitors!!!

  • Our modern life cannot be imagined without a computer; we communicate with our friends and relatives using the Internet. When we start working on a computer, sometimes we have to fix minor problems, namely:
  • clogged laptop or computer fan,

clogged computer mouse,

— with the help of which it becomes impossible to control the screen (laptop, computer). The topic contains personal photographs regarding a malfunctioning computer mouse, which is what I want to introduce you to.

Computer mouse repair

To make a computer mouse that stops working after a certain time, the fault here may be hidden in the simplest reason - contamination.

Clogging of this accessory occurs as a result of its use. When working at a computer, we often have to move the computer mouse and gradually it becomes clogged with dust, hair and other small particles. Of course, to repair a computer mouse, it must be disassembled.

How to disassemble a computer mouse


We unscrew the bolts (photo 1), carefully follow the sequence of disassembling the computer mouse.

We do not carry out any diagnostics on the circuit for electronic elements (diagnostics are carried out as a last resort). In two photographs (photo 2), in an enlarged plan, you can see a wheel with an axle, transmitting the signal of its rotation to the circuit. In the right photo, at the two ends of the wheel axis you can see small fragments of hair, lint and dust. Using a cotton swab, carefully remove small fragments of lint and dust; if some debris is difficult to remove, use tweezers.

After the regulations for removing dust and small fragments have been carried out, the computer mouse is assembled in the reverse order.

Contact cleaner It would be a good idea to wipe the contacts of the connector connected to the socket of a computer or laptop with the same cotton swab. In addition to the connector, you also need to clean the socket contacts. For cleaning contacts (connector and socket),. This regulation must be carried out carefully so as not to disrupt the electronic elements of the circuit itself. If you find a cable break in any area (between the connector and the mouse itself), soldering is used. Such a cable may consist of five wires. In my practice, the malfunction of the computer mouse was precisely the reason that I described. After fixing the malfunction of the computer mouse, I was satisfied with my work, PC mouse became manageable again.

That's all for now. Follow the section.

A mouse is a device that helps the user work on a computer. If it breaks down, many users do not know how to switch from the keyboard to the required system icons. This situation causes the session to end and search service centers for repairing electronic equipment, or purchasing a new device. If you have such qualities as perseverance, attentiveness, and the ability to work with a tester and a soldering iron, then you can easily, based on the information provided, quickly determine the cause of the device failure and even repair it. Let's consider repairs wireless mouse with your own hands.
Causes of failure.
Since the mouse is a reliable piece of equipment, in many cases the damage will be minor. It can happen due to:
1. Poor contact between the battery and the control board.
2. Failure of one of the electronic components.
3. Port failures Computer USB.
Identification of the cause of the malfunction and methods for its elimination.
To begin examining a broken device, you need to disconnect it from the power supply and remove the module from the USB computer wireless communication and remove the battery. To get to the control board in most models, it is enough to unscrew the fasteners located under the battery and use a flat-head screwdriver to disconnect the upper part of the case from the latches.


Visually or using a multimeter in the position of checking semiconductor devices, examine the plus and minus marks, connecting wires and soldering points for the presence of oxides and mechanical damage. Due to strong vibrations and mechanical stress, microcracks may occur at the junctions of elements with board tracks.


To identify them, you need to very carefully inspect and loosen the fastenings of the wires and electronic components of the board. When identifying suspicious or defective areas, they should be properly soldered.
If the measures described above do not restore the device’s functionality, check its resistance at the power terminals. It should be in the range of 400 - 600 Ohms. If the ohmmeter shows zero, then there is a short circuit in the electronic circuit; if it shows one, there is an open circuit. In these situations, it is necessary to check the electronic components. Any charred or swollen devices found must be replaced.
To check the health of the photodiode, connect the probe from the “V+” port to its positive input, and the probe from the “COM” port to the negative input. In this case, the multimeter is switched to diode testing mode. Turn on your phone's camera and point its lens at the photodiode. A serviceable element will light up in the displays.


If after all the above measures the mouse does not work, check the serviceability of the wireless module with a USB plug. Use the probe from the “COM” port to touch track 2, and with the other probe touch track 1. The readings should be 600 - 800 Ohms.


For USB checks computer port, you just need to connect a working device to it, such as a keyboard or memory drive. If the software responds after connecting, it means the port is working.
In other cases, when the failure could not be eliminated, the microcircuit needs to be replaced.

COMPUTER MOUSE REPAIR

Those who actively use computers (namely desktops or laptops, not tablets or smartphones) have probably learned from their own experience that the least reliable devices in computer technology are computer mice. I am sure that many PC users at home have accumulated a decent arsenal of these simple devices, which over time have a habit of ceasing to function normally or failing completely. I have accumulated a little less than a dozen of these “creatures” at home. It would seem, what kind of trouble? Just think, this inexpensive device failed. After all, the cost computer mouse, usually ranges from 2 to 7 US dollars (depending on the manufacturer and functionality These devices, of course, can cost significantly more). But, firstly, when we are talking about a dozen pieces, this is no longer such a small amount. And, secondly, the most unpleasant thing is that this “beast” usually fails at the most inopportune moment, when there is nothing to replace it, and to buy a new one, you need to run almost halfway across the city.

After another UNTIMELY broken mouse, when I didn’t have a spare one on hand, and all the nearby computer stores were closed, I thought: “what the hell, these mice aren’t that complicated and are probably easy to repair.” So I decided to try to restore 1-2 pieces. After 45 minutes of not very difficult work, the entire arsenal of my “pets” (computer mice) was restored and functioning properly. Now that I have some time, I decided to write a short article describing the process of repairing computer mice.

Computer mouse device

To begin with, let's get a little familiar with the structure of computer mice and their purpose. Computer mouse is one of the main devices to use GUI operating systems on desktop computers and laptops. There are many options for computer mice.

Functionally they consist of:

  1. Motion sensor (optical, mechanical, induction, gyroscopic, etc.).
  2. Two or more buttons for transmitting various commands to the computer.
  3. Control elements for “scrolling” web pages, text and graphic documents (joysticks, control wheels, touch devices, etc.).
  4. Means of connecting to a computer (wireless with a transmitter and receiver of information, wired with a connector for connecting to a PC).

Structurally, computer mice consist of a housing with drives for buttons, electronic circuit(can be made in the form of one or more microcircuits), sensor systems, buttons and wires. Wireless mice have means of transmitting and receiving information. Wired mice, depending on the type of connector used, can have a USB or PS/2 interface.

Note: We will consider one of the cheapest and most common options - wired optical mouse with two buttons, control wheel and USB interface.

Common computer mouse problems

The list of standard faults includes:

  1. Cursor control stops or becomes unstable.
  2. Stop the computer from responding to button presses.
  3. Lack of response to rotation of the control wheel, or unstable response (the effect of “slipping” of the wheel rotation).

Standard causes of malfunction of computer mice and external manifestations

Typically, problems with the operation of computer mice arise for the following reasons:

  1. Lack of a driver on your PC for a specific computer mouse. Outwardly it manifests itself in the complete (or partial) absence of cursor control on the computer screen from a connected mouse. When connecting the mouse to the computer, the information “Device not recognized” is displayed.
  2. Lack of response to pressing one or more buttons due to a broken micro button or a broken wire.
  3. Intermittent cursor control or complete lack of control. This usually occurs due to a break in one or more wires connecting the mouse to the computer connector.
  4. “Slippage” of scrolling web pages, text and graphic documents when rotating the control wheel. This usually occurs due to mechanical wear on the tip of the steering wheel axle connected to the rotation sensor. When the axle tip is mechanically destroyed, there is a complete lack of response of the cursor to the rotation of the control wheel.
  5. Failure of one or more functional components of the mouse.

Depending on the specific design and functionality of the computer mouse, there may be other manifestations of malfunctions. But, because in this case, we will consider an ordinary optical mouse of “Chinese nationality” as the most common in use due to its low cost, we will not mention them.

Computer mouse repair algorithm

Repairing a computer mouse can be roughly divided into the following stages:

  1. Check and install (if necessary) the appropriate driver.
  2. Disassembling a computer mouse.
  3. Direct troubleshooting.
  4. Assembling a computer mouse.
  5. Checking the functionality of a computer mouse.

Checking and installing a computer mouse driver

Typically, computer mice are made using Plug and Play technology (plug and use) and do not require additional software. Some (more complex) computer mice may be sold with installation drivers, but even if you don’t have them, you can always download them from the mouse manufacturer’s website. In addition, Windows 7 and higher operating systems have a fairly powerful built-in system for searching for computer device drivers.

You can set an automatic search for drivers (for any devices, not just computer mice) from the device manager. To launch Device Manager, launch the built-in operating system Windows system Control Panel program and open Device Manager. The path to it is Control Panel\System and Security\System\Device Manager. In addition, the “Device Manager” can be called using the built-in OS Windows functions"Search". For Windows 7, click the Start button and type Device Manager in the Search box (in Windows 10, click the Windows Search button to the right of the Start button). In the search results you will see a link to the “Device Manager” executive file, by clicking on which you will open the “Device Manager” window (see Fig. 1). In this window, find the item “Mice and other pointing devices” (see 1 Fig. 1), expand it, and double-click the left mouse button on the “HID - compatible mouse” button (see 2 Fig. 1).


After this, the “Properties: HID - compatible mouse” window will open in front of you (see 3 Fig. 1), which you need to open on the “Driver” tab, see 4 Fig. 1. Then you need to click on the “update driver” button, see 5 Fig. 1, after which the window Fig. 2 will open in front of you.

In the new window Fig. 2, select “ Automatic search updated drivers" (see 1 Fig. 2). After this, your PC (if it is connected to the Internet) will go into search mode and find you the latest working driver, or indicate that the existing driver does not require updating.

Disassembling a computer mouse

Most optical mice with a USB interface, see Fig. 3, consist of two parts: the top - the cover (see 1 Fig. 3 and 1 Fig. 4), and the bottom - the base (see 2 Fig. 3 and 2 Fig. 4) , which are attached to each other using 1 self-tapping screw (see 3 Fig. 4) and two plastic easily removable locks (see 4 Fig. 4).


Unscrew the self-tapping screw (see 3 Fig. 4) from the socket (see 3 Fig. 3), lift the back of the mouse case cover and, slightly pushing the cover back, disengage the plastic locks. Remove the cover. The disassembled view of the mouse is shown in Fig. 4. Appearance The contents of your mouse will probably differ from those shown in Fig. 4, but do not let this confuse you. The principle of repairing most optical computer mice is similar to that described below.


Computer mouse repair

After you have disassembled the mouse, you can proceed directly to troubleshooting.


As for eliminating wire breaks, they are eliminated by soldering. Typically, breaks occur in the area where they are connected to the board (see 4 Fig. 4), but they can also occur in the area where the cable enters the mouse body (see 5 Fig. 4), and even in the area of ​​the USB connector. In the latter case, use the tips presented in the article “”, but I will immediately make a reservation that your mouse recovery time will increase significantly.

The problem with “slipping” of the control wheel (see 6 Fig. 4 and 1 Fig. 5) arises due to the wear of the tip of the steering wheel axis (usually it has a hexagonal shape (see 2 Fig. 5)). This “trouble” is easily eliminated if, in parallel with the tip, several cores (see 4 Fig. 5) of a stranded copper wire (see 5 Fig. 5) are inserted into the hole of the control wheel rotation sensor (see 3 Fig. 5), which have about 0.05 mm in diameter. It is necessary to insert copper wires with the steering wheel removed, and only then install the wheel axle in place. This should be done without much effort so as not to damage the steering wheel rotation sensor and the hexagonal tip of the axle (see 2 Fig. 5). After you have sealed the connection between the tip of the steering wheel axle and the sensor, cut off the protruding wires using side cutters or regular nail scissors.

Sometimes the cause of malfunction of computer mice may be the failure of some functional unit. In this case, repairs become more complicated and involve replacing faulty components. As a repair kit for such repairs, you can use serviceable components from other faulty mice, if you did not save money when purchasing these products, but took several at once.

You should know that all functional devices of computer mice can be easily dismantled and replaced, even microcircuits with round pins. But to dismantle faulty microcircuits, it is advisable to use medical needles with an internal diameter slightly larger than the diameter of the microcircuit output. Insert 1 pin of the microcircuit into the hole of the medical needle and use a soldering iron with a thin tip to heat the needle at the point of contact of the microcircuit with printed circuit board. After the solder has melted and the needle passes through the hole in the printed circuit board with a little force, remove the soldering iron and, turning the needle, let the soldering area cool. Do the same with the remaining contacts of the microcircuit. Remove the faulty chip, and then replace the faulty chip with a working one and solder it.

The last of the proposed repair methods is quite labor-intensive, and it is advisable to do it only in the case of repairing expensive products.

Assembling a computer mouse

Assembling a computer mouse is done in the reverse order of disassembling it. First, install all of it on the base of the mouse (see 2 Fig. 4). functional elements, laying the cable in such a way that it does not interfere with the installation of the cover (see 1 Fig. 4). Then the easily removable locks are connected with the back of the mouse cover slightly raised and the self-tapping screw is tightened with the cover pressed to the base of the mouse body.

  1. In order to be able to replace faulty components when repairing computer mice, it is advisable to buy several mice of the same type at once.
  2. If the mouse becomes faulty, or the quality of its operation does not satisfy you, do not rush to throw it away. Perhaps the above recommendations will help you restore it.
  3. Typically, most of the faults that appear during the operation of computer mice made in China are laid down at the stage of their manufacture. Therefore, after repair, these mice last quite a long time. In this regard, often the repair of these simple products is technically and economically justified.

Itsenko Alexander Ivanovich

Often the cause of such problems is simple blockage. There are often cases when something is spilled on the mouse, and not always ordinary water, but, for example, hot sweet coffee. In such situations, there are two options: purchase a new device or try to repair the old one.

If you know how to disassemble a mouse, you can avoid downtime while working on your computer and fix the problem yourself.

The main reasons for the breakdown of a computer “rodent”

First, find out what caused the problem. You may not have to disassemble the mouse. So, the main types of breakdowns are as follows:

  • technical - frayed wire, damage to USB or PS/2 connectors;
  • mechanical - incorrect operation of the scroll wheel, lack of response to button presses;
  • Incorrect setting for a specific application or game.

The latter situation does not require repairing the manipulator. It is enough to make the necessary settings. Before disassembling the mouse, make sure that the cord (in the case of a wired device) and the connector are intact. If the cause of the breakdown lies in them, it is useless to do this. When the manipulator does not respond to the user’s actions due to the scroll wheel not working, clogging or other reasons, there is nothing else left to do but begin repairs.

Required Tools

How to disassemble a mouse? You don't need a wide range of tools for this. All you need to do is arm yourself with a Phillips screwdriver and prepare a container to safely store the screws. Otherwise, when it comes to assembly, they may simply not be there. Carried away by his work, the master sometimes simply sweeps them away with his hand, without noticing it. But finding these small details turns out to be very difficult.

Instructions for disassembling a wired mouse

Follow these steps:

  1. Disconnect the mouse from the computer and turn it upside down.
  2. At the bottom there are mounting screws. They may not be immediately noticeable under the stickers. In this case, clean the surface of the device and unscrew the screws.
  3. Open the case, holding the mouse with both hands by the different halves. You need to be extremely careful, otherwise you can break off the latch, which is located on the cover near the wire.
  4. The scroller (scroll wheel) is removed from the base of the device. To do this, pull it up slightly. The wheel should come out with the latch or fastener.
  5. Remove the mouse chip or board. If it is secured with latches, use your fingers to pry them back, being careful. If screws are used, they are unscrewed and placed in a prepared container. The board is easily separated from the case if you pull it up.

Analysis of the wired mouse is completed. After troubleshooting, collection is performed in the reverse order. Be careful, some parts are fragile and can be damaged even if you apply little force.

Analysis of a wireless mouse: Logitech

Modern manipulators are not connected to the computer with a cord. Logitech occupies a leading position in the production of wireless mice. Despite all the shortcomings, which, however, have already been eliminated, these devices are considered one of the best.

So, how to disassemble a Logitech mouse:

  1. Unscrew the screws that hold the two halves of the case together. To do this, you will need to undermine the elastic cushions: one in front and two in the back. There is no other way to get to the screws.
  2. Carefully separate the two halves of the housing.
  3. At the top there is a small board connected to the main one using a cable. To disconnect, remove it from the connector and then pry it out with a screwdriver. plastic latch. It is an element for fixing the cable.

The question of how to disassemble a Logitech mouse has been answered. It is assembled in the same way, only the steps should be performed in reverse order.

Analysis of a wireless mouse: A4tech Bloody

Using quality laser sensor in a manipulator - an undeniable advantage. This is exactly what A4tech mice with the Bloody brand are ready to boast of. They belong to the gaming class.

How to disassemble the A4tech Bloody mouse? More on this in the instructions below:

  1. Unscrew the two screws that are on the case and remove the top part. To do this, pry it slightly, being careful not to damage anything.
  2. Turning the mouse frame over, you can see a metal plate. Unscrew it.
  3. Remove the mouse wheel. If there is dirt or hair, clean it. If you take the Bloody mouse apart, you will see that the wheel consists of two parts.
  4. To remove the board, carefully unscrew the screw.

Now it’s clear how to disassemble the A4tech mouse. To assemble it, follow the same steps, only in reverse order.

As practice shows, disassembling a computer mouse is not difficult. It is enough to follow the basic rules:

  • perform all actions carefully so as not to inadvertently damage the fragile elements of the device;
  • make sure that none of the parts are lost;
  • if there are legs, be sure to install them in place, otherwise it will be difficult to work with the manipulator;
  • If there are latches, please note that there should be a click when they are secured.

Before disassembling a wireless mouse or device with a cord, evaluate your own strengths and skills. Maybe, the best option will take the device for repair, where it will be repaired by experienced specialists.

Considering the widespread use of computers that is observed today, the instructions “How to disassemble a mouse” will be useful in various situations.



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