The mouse wheel does not scroll the page. The video on the mouse does not work

If your mouse wheel suddenly stops working (for example, as a result of a fall or some kind of impact). Without preliminary symptoms in the form of the page jerking up and down when scrolling and at the same time spinning freely, then this article will probably help you.

Mouse wheel scrolls

The mouse wheel is spinning because it's broken! Literally, the plastic axis fell off, through which the torque is transmitted to the rotation sensor, the repair of which is described in another article:. And if the mouse does not work at all, then check if the mouse wire is bent at the base.

Such a breakdown is not a reason to throw away the mouse if you want to tinker for 20-30 minutes (if you go to the store for a new mouse, you will probably spend at least an hour).

I will describe a working and reliable method for repairing a broken mouse wheel. The mouse itself:

Let's disassemble the mouse

Unscrew the screw from below and separate the two parts of the case.

Externally, the mouse looks fine, even the wheel spins in the same way as on a working mouse. Except that it doesn’t spin in steps and with virtually no resistance.

Let's take a closer look at the inside of the mouse:

By default, the double-click speed slider should be in the center, and the sticky mouse buttons option should be disabled. Try setting these parameters and check if the problem is resolved. If not, another radical software way to “cure” a double click is to remove the mouse driver. How to properly remove the driver is written.

Conclusions

Mice are one of the most actively used computer devices. Therefore, it is not surprising that they often fail. However, due to the simplicity of their design, in most cases anyone can fix a mouse!

To do this, you don’t need to know how to solder or understand electronics. The main thing is to clearly diagnose the cause of the breakdown. Here, as in medicine, correct diagnosis- the path to successful repair.

I hope our article will allow you to determine what exactly is broken in your mouse, and therefore, to fix it. Good luck with your renovation!

P.S. Permission granted to freely copy and quote. this article subject to indicating open active link to the source and preservation of the authorship of Ruslan Tertyshny.

User question

Hello. Please tell me what to do with a non-working mouse wheel. We reinstalled Windows and now the mouse partially does not work: the arrow runs across the screen, the left and right buttons work, but scrolling through the wheel does not work (you have to drag it with the pointer, which is inconvenient). We tried to connect another mouse to our computer - the same story (our mouse works on another PC) ...

What should I do in this case, why does the mouse not work at all?

PS: we went into the mouse settings in the Windows control panel - but there is no “Wheel” section at all, in which you can set how many lines to scroll the page (although there used to be one!).

Hello!

The problem described above is quite typical, and most likely it is associated with the lack of drivers (probably for some universal controller serial bus USB ports, or on the mouse itself (which is less likely, judging by the description)).

In the article I will consider the user’s question and other reasons for this behavior of mice...

By the way, if your mouse doesn’t work at all, I recommend reading these instructions:

Reasons why the wheel does not work

(the mouse twitches and slows down)

1) Drivers were not installed (or failed)

Perhaps checking the drivers is the first thing you should start with (especially if your problem matches the description of the issue, see above). To do this, open device Manager .

Reference! To open the device manager: press the Win+R button combination, and enter the command devmgmt.msc, click OK. An example is shown in the screenshot below.

The screenshot below shows the “picture” of what usually happens after reinstalling Windows (by the way, in newer Windows operating systems, drivers are installed automatically on many devices). Please note that all devices for which no drivers were found will be located in the “Other Devices” tab, and a yellow exclamation mark will appear next to each one.

There are no drivers for a dozen devices... Device Manager in Windows 7

Next, I recommend opening the “Mice and other pointing devices” tab. It should indicate your mouse; as a rule, it is an HID-compatible mouse. If your tab is empty, or it only contains the “ELAN...” device (touchpad, relevant for laptops), then you simply do not have a driver: either for the mouse (this often happens with gaming mice) or for the USB port controller .

Mice and other devices

How to update drivers:

1. You can install the drivers that came with your computer (usually, they were either downloaded by the seller onto your hard drive or recorded on a separate CD\DVD);
2. Take advantage special utilities for auto-searching and updating drivers. I have one big article dedicated to this on my blog:
3. Find drivers by VID and PID (special identifiers by which you can find the manufacturer of your equipment, its make, model, etc.) in a search engine, for example, Google. This is a universal method, I will consider it below. The only negative is that there must be access to the Internet (and without drivers for the network card, it may not exist...).

And so, in the device manager you see some device for which there is no driver. Right-click on it and open its properties.

In properties, open the tab "Intelligence", select option "Equipment ID" and copy the first line, which will contain the values ​​VID, PID, REX, SID (etc.).

Problems with the mouse caused by glitches in programs can be resolved independently. Hardware failures, including those related to the mouse wheel, should be fixed by yourself only in cases where you are technically savvy and are not afraid of losing the warranty on the gadget.

They do everything possible to simplify the interaction between the software and the user. Although currently the unspoken standard setter in this area, Microsoft, has relied on touchscreen technologies, as can be seen from the new version of the system, it is quite difficult to work with programs in Windows without a mouse. If the mouse wheel does not work, then many users begin to panic. Being electronic device, the mouse may indeed fail, but before going to the store for a replacement, it would be a good idea to try to more thoroughly check its performance.

Since its inception, the mouse-type manipulator has undergone a number of changes, affecting, first of all, the principle of reading movement data: a heavy ball covered with a layer of rubber and rollers, constantly clogged with debris, were replaced by an optical system. But the wheel and buttons have undergone less dramatic changes: there are holes located on the inside of the disk at a certain distance from each other. On one side of the disk there is a light-recording sensor, and on the other there is an infrared diode, a classic optocoupler pair. When the user rotates the mouse wheel, the light from the diode is periodically interrupted. Such a system allows electronic circuits to count pulses and determine the direction of rotation and speed.

If the mouse wheel does not work, this, as indicated, is not a reason for an exchange. First you need to check which programs are experiencing problems and try to replace them. Sometimes the problem lies in incorrect program settings.

The next step is to make adjustments to Windows settings. Click the “Start” button, open the “Control Panel” and go to the “Mouse” tab. Here you can make changes to the operation of the wheel.

If everything is so simple, then why are the forums full of questions like “the mouse wheel doesn’t work”? The answer is simple: much more often the problem lies in the hardware. Sometimes the mouse wheel does not work due to a malfunction of the optocoupler pair. Luckily, there are some repairs you can do yourself at home.

From the computer, take a screwdriver from the watch kit and unscrew the two screws (usually) on the underside of the mouse. The screws may be hidden under stickers, so carefully probe the hidden surface. Then carefully open the case.

The optocoupler pair is easy to find - it is next to the wheel. Using a piece of dry cotton wool, remove all dirt from the window-holes on the wheel rim, and also carefully wipe the LED and sensor. Often you can see entire strands of hair blocking the light. IN in rare cases it is necessary to align the level of the diode and sensor (if they are bent, this is immediately noticeable).

Sometimes the situation when the mouse wheel does not work is due to its rubber coating. Over time, the rubber becomes a little larger in diameter and does not fit too tightly onto the plastic base of the wheel. When trying to rotate the wheel, the user actually rotates only the rubber ring, while the internal mechanism itself remains at rest. What’s interesting is that it’s not always possible to determine such a malfunction without disassembling the case. Owners of A4Tech products who are looking for an answer to the question of why the wheel does not work are well familiar with it. The solution is quite simple: the seat of the base disk and the inside of the rubber ring are thoroughly wiped of grease and dust using cotton wool and alcohol. Then the ring is fixed in the simplest and most effective way - with superglue. Two or three points around the perimeter are enough.

If this doesn’t help, then, alas, you’re on your way to a workshop or store to buy a new mouse. With any decision, you must remember that you should not ignore installing the driver on the device.

Users don't realize how important the mouse wheel is until it becomes unusable. Meanwhile, it is the wheel that is responsible for scrolling pages, changing the scale in editors and browsers, opening a page in a new tab, and also for some gaming functions. What to do if the wheel doesn't work? Don't rush to change your mouse - try troubleshooting.

How to fix a mouse wheel

The key reasons for problems with the wheel are incorrect software or mechanical damage mice. If you detect a failure, first connect the accessory to another computer and check its functionality. If scrolling works, the reason is in the settings, and if not, in the solutions vary for each specific case.

If pressing and scrolling up and down does not work

A mouse that does not respond to clicks or scroll the wheel must be disassembled to understand the cause of the failure. Procedure:

1. Remove the protective pads at the bottom of the mouse and unscrew the bolts.
2. Disconnect bottom panel. You will see a board, and below it is a scroll mechanism.
3. Lift the board after unscrewing the bolts.
4. Take out the wheel and pay attention to the axle - most likely, it is broken off on one side.

If you find a broken axle, try to fix it using a paper clip:

1. Unbend the paper clip, bend the wire in half and twist it into a bundle.
2. Attach the part to the wheel, in the place where the axle was located, and cut it to size with pliers, adding 1-2 mm.
3. Heat the desired part of the wire red-hot on a gas stove or using a piezo lighter and apply it to the fracture site of the axle.
4. Once the material has melted, reassemble the wheel and check for scrolling and pressure.

Photo gallery: how to disassemble a mouse yourself

Step 1. Remove the base of the mouse Step 2. Remove the wheel Step 3. Replace the wheel axle Sometimes it is not the axle itself that breaks, but the tabs that hold it

If the mouse works and the wheel spins evenly without hitting anything, reassemble the case and check the functionality.

Sometimes the axle does not break off, but falls out. If you find a pin that has fallen out, replace it with a larger diameter axle.

Pages won't scroll

Check your settings software, if the mouse does not scroll the page. To do this:

1. Open "Start - Control Panel". Select "Hardware and Sound - Devices and Printers - Mouse".
2. Open the Wheel tab and check the scroll values.
3. Increase the values ​​if necessary and click OK.

Check the operation of the mouse - if the method does not help, reinstall the driver. Sequence of actions:

1. Open Device Manager.
2. Find Mice and Pointing Devices.
3. Select the mouse you are using and double-click on its name.
4. Open Driver and click Update.

If the update does not bring results, follow the same path and click “Uninstall”, and then reinstall the driver.

If the pages “jump”

In a situation where the wheel works, but when scrolling quickly the page turns jerkily and “jumps” up and down, the touch sensor. To fix it:

1. Disassemble the mouse using the instructions above.
2. Remove the protective cover from the scroll mechanism.
3. The sensor is pressed to the wheel by four metal petals - carefully bend them one by one.
4. Bend the protective part of the wheel, remove the clamping mechanism and wipe it and the inside of the device with a cotton swab dipped in alcohol.
5. Place the clamping piece on the table and press on the middle with a screwdriver so that a dent remains. She will guarantee correct operation details as you scroll.
6. Place the mechanism in place, bend the protection and press the petals back tightly.
7. Assemble the wheel, replace the board and the lower part of the case. Secure the parts with bolts.

Check the functionality of the mouse. If scrolling does not work, contact service or replace the mouse.

Video: Pages twitch when scrolling

The wheel does not spin and rattles

When the wheel does not scroll at all, or something rattles inside the mouse, look for a hardware failure. First of all, lubricate the mechanism. To do this, disassemble the accessory as described above and clean the sensor with alcohol. Prepare liquid silicone lubricant - for example, WD-40. Drop it inside, assemble the wheel and spin it two or three times. Check the operation - if lubrication does not help, replace the pressure petals. To do this:

1. Disassemble the mouse and remove the wheel.
2. Break off the petals holding the protection.
3. From copper wire make 4 brackets of the appropriate size.
4. Solder the brackets in place of the petals and assemble the mouse.

By disassembling the mouse yourself, you automatically lose your right to warranty service.

Pressing the wheel doesn't work

If the mouse wheel scrolls pages, but the system does not respond to clicks, listen for clicks when clicked. If yes, check the program settings:

1. Download the hotkey remapping app Antsoft Key Manager or Oscar.
2. Find out what function is assigned to the wheel click.

If the click function does not work only in the browser or game, you can not download additional applications- check the information in the program settings.

If the click is not heard, the problem is a hardware failure. Disassemble and repair the mouse or replace it with a new one.

Video: how to repair a wheel axle with your own hands

Conflict between Windows 10 and mouse drivers - how to fix it

In Windows 10, scrolling works in Explorer, browsers, editors and the standard environment, but in the Start menu and parts pre-installed applications- No. The reason is a conflict between the system and device drivers. If you encounter this problem, install Windows updates. To do this:

1. Open Update Center and click Check for Updates.
2. When the system collects information, click “Install updates.”
3. Wait for the process to complete and restart your computer.

The method may not help - in this case, do the same steps and roll back the update. If working with updates does not bring results, download mouse drivers from the official website. Try combinations:

• system update + new driver;
• system update + old driver
• system without updates + new driver.

If the problem persists, contact service technical support Windows.

Problems with the mouse caused by glitches in programs can be resolved independently. Hardware failures, including those related to the mouse wheel, should be fixed by yourself only in cases where you are technically savvy and are not afraid of losing the warranty on the gadget.

The most weak point in modern computer mouse- this is a scroller, a scroll wheel. Sometimes the wheel breaks down within the first week after purchase. Scrolling becomes capricious, does not work for a short rotation, scrolling accuracy is lost, large gaps occur during intensive scrolling, etc. And sometimes it happens that the window scrolls in reverse side!
This will throw anyone out of balance.

Mother! She won't scroll! Again!!!

1. Mouse with optical scroll wheel sensor

2. Mouse with mechanical scroll wheel sensor

We remove all unnecessary things and see an electromechanical encoder, which is a bit like a trimming resistor. Here it is, with an orange octagon inside.

Carefully bend the insides away from the frame, and if you have unsoldered the encoder, then simply disassemble it. The metal retainer is usually mounted on plastic legs. Everything is removed very easily, the main thing is to work without fanaticism.

And we see inside the real reason failure of the scroll wheel: the same garbage and dirt. Most likely it is a mixture of silicone grease, ground dust and hairs. The contact springs are also covered in dirt.

We take cotton wool, dip it in alcohol (isopropyl or ethyl), vodka, beer or special drink. cleaner for electronic contacts. It is better not to use acetone, because... there is a risk of dissolution and deformation of the plastic parts of the encoder.
Next, carefully wipe the contact pads and springs. Be very careful when cleaning the springs, otherwise you may ruin everything.

I think the difference is obvious. Look how much dirt has collected on the cotton wool.

Tweak the elasticity of the scroll wheel

User question

Hello. Please tell me what to do with a non-working mouse wheel. We reinstalled windows and now the mouse partially does not work: the arrow runs across the screen, the left and right buttons work, but scrolling through the wheel does not work (you have to drag it with the pointer, which is inconvenient). We tried to connect another mouse to our computer - the same story (our mouse works on another PC) ...

What should I do in this case, why does the mouse not work completely?

PS: went to the mouse settings in the panel windows control- but there is no “Wheel” section at all, in which you can set how many lines to scroll the page (although there used to be one!).

Hello!

The problem described above is quite typical, and most likely it is associated with the lack of drivers (probably for some kind of universal serial bus USB port controller, or for the mouse itself (which is less likely, judging by the description)).

In the article I will consider the user’s question and other reasons for this behavior of mice...

By the way, if your mouse doesn’t work at all, I recommend reading these instructions: https://ocomp.info/ne-rabotaet-myish-chto-delat.html

Reasons why the wheel does not work

(the mouse twitches and slows down)

1) Drivers were not installed (or failed)

Perhaps checking the drivers is the first thing you should start with (especially if your problem matches the description of the issue, see above). To do this, open Device Manager.

Reference! To open the device manager: press the Win+R key combination and enter the command devmgmt.msc, click OK. An example is shown in the screenshot below.

The screenshot below shows the "picture" that usually happens after reinstalling windows(by the way, in newer Windows operating systems, drivers are installed automatically on many devices). Please note that all devices for which no drivers were found will be located in the “Other Devices” tab, and a yellow exclamation mark will appear next to each one.

There are no drivers for a dozen devices... Device Manager in Windows 7

Next, I recommend opening the “Mice and other pointing devices” tab. It should indicate your mouse; as a rule, it is an HID-compatible mouse. If your tab is empty, or there is only an “ELAN...” device (touchpad, relevant for laptops) in it, then you simply do not have a driver: either for a mouse (this often happens with gaming mice), or to the USB port controller.

Mice and other devices

How to update drivers:

1. You can install the drivers that came with your computer (usually, they were either downloaded by the seller to your hard drive, or recorded on a separate CD\DVD);
2. Use special utilities to auto-search and update drivers. I have one big article dedicated to this on my blog: https://ocomp.info/update-drivers.html
3. Find drivers by VID and PID (special identifiers by which you can find the manufacturer of your equipment, its make, model, etc.) in a search engine, for example, Google. This universal method, I’ll look at it a little lower. The only negative is that you must have access to the Internet (and without drivers for network card- it may not exist...).

And so, in the device manager you see some device for which there is no driver. Click on it right click mouse and open its properties.

In the properties, open the "Details" tab, select the "Hardware ID" option and copy the first line, which will contain the values ​​VID, PID, REX, SID (etc.).

Copy the line with VID and PID

Next, insert the line into search engine(eg Google) and start searching. In my case, for example, dozens of sites were immediately found (and in first place was the website of the laptop manufacturer), where the drivers were downloaded.

Intel USB 3.0 - Driver

After installing these and rebooting the laptop, the mouse was detected and began to work as expected (including the wheel ☺) ...

2) Is the USB port working or is it disabled?

The second thing to pay attention to is whether the USB port works at all. However, in this case, your mouse will not work at all! That is, even the mouse pointer will not move.

First, turn the mouse over and see if the LED on it is lit? If it lights up, it’s not bad, it means there is power and everything is fine with the wire. If it doesn’t light up, try connecting another mouse or flash drive to this USB port. By the way, USB ports may often not work due to a lack of drivers, and not due to physical breakdown(about which I wrote a little higher).

By the way, it would also be a good idea to connect the mouse to another computer (laptop) to see if it works on it.

Such simple rearrangements very quickly help determine the culprit...

3) Damage to the mouse (breakage). Physical wear and tear

With active use of the mouse (especially in games, various shooting games, where in a fit of passion users often press forcefully and sharply, hitting the buttons), it eventually becomes unusable (nothing lasts forever). As a rule, it all starts with: a double click of the left/right button (although you do a single one), bad scrolling, the cursor begins to twitch “nervously”, etc.

The most better diagnosis in this case, try connecting another mouse to your PC (or this mouse to another PC) and see how it behaves.

In general, with physical wear and tear - best advice: buy new mouse(even though it doesn't cost much). All these repairs, soldering, etc. for an unprepared user - 99% end in wasted time...

4) Incorrect settings in mouse settings in windows

And the last thing I wanted to focus on: the mouse parameters that are set in the windows control panel. To check your settings: Open the "Hardware and Sound" section in Control Panel, then click the "Mouse" link in the "Devices and Printers" subsection (see screenshot below).

Hardware and Sound: Mouse

Next, open the “Wheel” section and adjust the number of scrolled lines when the wheel moves (this is set for vertical and horizontal displacement separately). For each mouse, the parameter is individual (and it also depends on the user - one is comfortable with turning half the page at once, another needs 1 line...).

Vertical and horizontal scrolling

It would also be a good idea to go to the “Pointer Options” tab and adjust the speed of the pointer. I recommend checking the box next to "Enable" increased accuracy setting the pointer." Thanks to this, your mouse will not twitch as if dumbfounded when you aim at some insignificant detail when you move the pointer slightly.

Pointer Options

How to do without a mouse wheel:

1. The keyboard has special keys: PgUp and PgDn. Using them you can quickly scroll the page, convenient even if you have a mouse;
2. "Space" key - if you press the key, the page will scroll down. To scroll up, press Shift+Space;
3. You can also use your mouse pointer to drag the slider up or down (not very convenient, but it also works).

This is where I end this article. All the best!

For additions - a separate merci...

ocomp.info

Is your mouse wheel glitchy?

Sometimes the mouse wheel glitches: this manifests itself in different ways: sometimes the scrolling does not work (the page simply does not scroll), it slips or the scale does not change. What can you do?

If your mouse wheel is glitching, I offer a couple of solutions.

First, if the mouse is fancy or has a lot of buttons, make sure that correct drivers for your OS.

Secondly, the mouse program must also be running. (i.e. be near the clock in the lower right corner of the screen)

Thirdly, if the wheel is buggy in a certain browser/program: a) try running it as an administrator.

b) if it’s Firefox (for Opera and others like it, there should be something similar)

In short, go to Settings, select “additional”, click on “general” and check the box next to “use” smooth scrolling”

Fourth, dig into your mouse settings. Go to Start->Control Panel->Mouse. What can you do here (I’m writing this article from XP, I believe it’s about the same on Windows 7), see the screenshot below.

Lastly, if none of the above helps, post the name of the mouse here and I’ll try to help)

aswin.ru

How to set up the mouse wheel in windows

Sometimes scrolling pages with the mouse wheel fails. The mouse seemed normal, but for some reason the pages suddenly began to turn very slowly. And with this problem there are very great inconveniences when working on a computer:

1. It becomes inconvenient to flip through photos.

2. Flip through music music player.

3. And over time, such inconveniences due to such a malfunction become many.

But some people are used to working without a wheel. After all, really, why do it, if you can take and use a moving “stick”, it’s faster with it. But you shouldn’t throw away the wheel just because of the speed of action. Even if you can scroll through photos with music using the keyboard, it’s better not to forget about the scroll wheel. It’s all the same and will always be more convenient, and in the first case it’s by searching for some folder, for example, you have a very large number folders, but you need to find one, and with a wheel in at the moment it will be more convenient here, because scrolling through it slowly you will not miss anything and will find your favorite folder without any problems. Well, the wheel is also important for those who like to play modern games, there it has very great value.

So how to solve this problem? How to return to the previous mode of operation? If you are sure that the problem is not with the mouse, but with a configuration failure, then you can take this action:

Click "Control Panel/Mouse/Wheel" and increase the number in "Number of Rows"

If nothing changes even with an increase in the number, it means that something has happened to your mouse wheel and in this case only replacing it will help, and your best bet would be to buy a new mouse. After new purchase you will be absolutely sure of its serviceability.

Hope dies last or the computer mouse will live!

It happens that the mouse wheel does not work at all. First of all, look further: My Computer - Properties - Hardware - Device Manager, then select Mice and other pointing devices. If there is a question mark there, then try installing the driver for the corresponding model of your mouse (after successful installation drivers, you can configure them for any performing operation).

If the mouse wheel still does not scroll, then disassemble it with your own hands and clean it (with a brush). And if this doesn’t help, then really buy yourself a mouse (or you can make a mouse yourself, it’s called modding), maybe you’ll even find one that fits your palm more comfortably, and besides, they’re not expensive. At the moment I have no wired mouse and which is very convenient and comfortable. You can control your computer without a mouse at all, but this will be described in another article.

I offer to download as a gift free book: reasons for PC freezes, data recovery, computer network through electrical wiring and many others interesting tricks.

Did you like this useful article? Subscribe to RSS and get more information you need!

mycompplus.ru

Mouse scrolling doesn't work

In the Windows 10 Start menu, if you select the All Apps section, you can access all installed programs, including standard ones. By scrolling the mouse wheel, the user can select necessary software and run it. However, after another small windows updates 10 users began to complain about the “non-working” mouse wheel. In fact, it is physically intact. However, with the system update, changes were made that affected the functionality of the mouse scroll wheel. This problem can be fixed by editing the settings.

The mouse has long become an indispensable component of any computer. Despite the fact that in modern solutions The mechanical method of determining the cursor position has not been used for a long time, having given way to a more promising optocoupler principle; the number of topics on forums and support service sites where users claim that the mouse wheel does not work is still large. This malfunction may manifest itself in different ways: for some, an attempt to scroll leads to spontaneous movement of the page up and down, for others it is impossible to achieve any one scrolling speed. Of course, if the mouse wheel does not work, then its functions in most programs can be duplicated using a special slider, as it was before, in the era of mice without a wheel. Although, as is known, to good man gets used to it quickly. Accordingly, when the user notices that the mouse wheel does not work, he buys a new one or tries to repair the existing one.

Disassembly

Although now the cost of mice is quite low, especially budget models, and everyone can afford to buy a new device, however, sometimes you don’t want to exchange your usual mouse for an unfamiliar “rodent”. There is a way out! A problem where the mouse wheel does not work is usually easy to fix. To do this, you should disconnect the device from the computer - accidentally touching the board elements can permanently damage the mouse. Then you need to unscrew all the retaining screws from the bottom side. They can be under the pillow legs or a sticker. These elements are easily pryed off with a thin screwdriver. After this you can remove the cover. By the way, sometimes there is an additional latch, so accuracy and leisure are required - excessive force is not required here. Now you can see the culprit of the malfunction - the wheel.

Repair. Mechanics

You should not try to remove it from the latch by bending the latter. It is much more efficient to lift the main board (sometimes it is held in place by screws) and remove it from the guides at an angle. Next steps depend on the position detection scheme used. In some models, a common axis rotates a small plastic disk with a block of locking contacts. In this case, the mouse wheel does not work (because the metal plates have oxidized and current does not pass through them). It is necessary to carefully bend the clamps and remove the disk rotated by the axis. With him inside there are contacts - they need to be wiped with cotton wool soaked in alcohol. Assembly is carried out in negative sequence. However, such systems are becoming increasingly rare. If the wheel of an x7 mouse does not work, in which an optocoupler pair is installed, and not contacts, then recovery is performed differently.

Optics

In new models, the wheel disk itself is perforated. On one side of the board there is an LED, and on the other there is a photocell. During rotation, the flow of light is interrupted, and the pulses themselves (alternating “yes - no”) are converted by electronics into displacement signals. Malfunction may occur due to clogged holes. Simple cleaning helps.

Addition

Sometimes the problem lies in the fact that over the years of using the mouse, a layer of dust and grease accumulates between the plastic base and the rubber coating of the wheel. All this needs to be removed, wiped with alcohol and all components of the device returned to their place.