A common reason some laptop buttons stop working is due to damaged paths on the device's keyboard board or a significant amount of debris accumulating. Below we will tell you what to do in this case - how to disassemble the laptop for cleaning, restore damaged tracks and eliminate others, including software reasons, for which the above malfunction may occur.
If the laptop keyboard was flooded
If, as a result of negligence, the keyboard of the device was flooded, it is important to quickly de-energize the device, remove the battery and clean and dry, having previously disconnected the input device. If you neglect cleaning, then over time, some of the tracks can rot, as a result of which you will have to make rather difficult repairs - one or several buttons may simply stop working.
Consider how to disassemble a laptop for cleaning in the case described above:
- De-energize it and remove the battery.
- Dismantle the data input device, for which:
Removing the buttons and cleaning the keyboard
To remove the key without damaging the device, you usually need to press it slightly from above and pry it from below with a thin screwdriver. It all depends on the laptop model. The buttons are attached here to latches to the so-called. the elevator. 
The number of mounts can be from three to four. In the first case, only one connection will be mobile - upper or lower, in the latter - both connections will be mobile. We are primarily interested in the fixed connection of the elevator. It is from this side that you will need to pry it off if you want to safely snap it off. Most often, fixed connections are located at the bottom. Then just pull the tool up.
After dismantling all the buttons, you can proceed directly to cleaning. You can work with simple wet wipes. You can also use various cleaning fluids, with the exception of aggressive ones - acetone, etc., which can easily damage the circuit. After removing all dirt, reassemble the device - this must be done in reverse order.
There will also be no particular difficulties with installation:
- lower the key pad onto the spring-loaded element in the center;
- push it straight down vertically until it clicks.
The device will start working normally if accumulated debris was the cause of the malfunction. If not, defective PCB tracks could be the likely cause. You can also repair them yourself if the damage is not very extensive.
Recovering the tracks on the keyboard board
In the case of faulty tracks, you will have to completely disassemble the device. It will be necessary to repeat all the actions described, and then dismantle the elevators. They are shown in the photo below.
FROM last action difficulties should not arise, since they are removed quite simply, especially from the stationary side.
After all the elevators have been removed from the data input device, it will be possible to dismantle part of the data input device from the aluminum substrate.
The polyethylene board with tracks is also removed. On older laptops, you will also need to dismantle the plastic edging... Before this, it is advisable to heat the part with an ordinary hair dryer. Subsequently, during the assembly phase, regular superglue can be used to secure the plastic and restore the fasteners.
Next, we will work with a plastic board on which the tracks are drawn. The problem is that the track board includes two plates, so to start repairing, these layers also need to be disconnected:
New paths are drawn right on top of the rotten ones, but the entire area will need to be thoroughly cleaned of dirt before that. After the renewed track has dried, it will definitely need to "ring". The polyethylene part can be collected no earlier than an hour and a half after carrying out the described actions.
Next, the repaired layer is laid on an aluminum substrate, and on top - a part with spring-loaded elements. You can check the performance right now by connecting it to a PC and opening, for example, a regular notepad. If everything works fine, continue assembling the device, remembering to turn off the laptop before doing this.
Check for obvious reasons that might be causing the problem
But before you start disassembling and cleaning the keyboard, first make sure that the reason why several buttons stopped working is not due to your inattention or other obvious things. For example, if the laptop does not respond to pressing numbers, check that you did not accidentally touch the Num Lock, which is responsible for disabling this unit. Some laptop models support a combination of Fn and Num Lock.
Sometimes problems with devices can be software problems. For example, the driver responsible for its functioning may be damaged due to the influence of a virus. The first step in this case is to scan the system with a regular anti-virus, or it can be one of the specialized utilities, for example, the free Virus Removal Tool from Kaspersky Lab. Then reinstall the required drivers.
Temporarily replacing the physical keyboard
To be able to download antivirus program on the Web and perform some other elementary operations on a laptop without a physical keyboard, you can use a virtual one. You can activate it through "Start":
- in this menu select an accessibility section;
- click on the line "On-screen keyboard".
To enter the desired characters, just click on them with the mouse. Since the eighth windows versions instead of the standard screen one, you can use a special touchscreen gadget for a laptop or tablet. It works without touch screen - clicks are also made with the mouse.
Activation takes place as follows:
- by clicking the mouse, call the context menu of the taskbar (the bottom bar of the screen);
- select "Properties" from the menu;
- in the properties of the taskbar, open the "Toolbar";
- check the "Touch Keyboard" checkbox and click "Apply".
On a computer, few people will envy. And, as often happens, such troubles most often happen exactly when the submission of reports is "burning", a set is performed during the battle for the fate of the world in the next computer game etc.
On the other hand, the question “why does not the keyboard on the computer work” is asked not too often, since with the beginning of the “USB era” many “childhood diseases” in this area of \u200b\u200bcomputing devices have become a thing of the past. In light of this, the breakdown of the keyboard is a reason for a kind of pride in their "luck".
Connection
In all modern keyboards to connect with motherboard a USB serial bus interface is used. It has a number of advantages over the discontinued PS \\ 2 standard, among which the possibility of "hot swapping" can be especially noted. That is, the user can theoretically, with the system unit connect and disconnect the plug corresponding to the free connector. And many people use it, especially the owners of portable computing machines... In this case, there are two negative points. Firstly, it was noticed that frequent switching of the device leads to the fact that the spring-loaded contacts in the plug lose their elasticity, as a result of which the performance is disrupted (the power or data line disappears).
Unsurprisingly, this is followed by the question "why is the keyboard not working on the computer." Thus, for frequent connection the plug wears out and needs to be replaced. Secondly, sometimes when hot-swapping the device, it failed, so this feature should not be abused. To check the contacts, you need to disconnect the keyboard plug and carefully reconnect it, gently shaking it in the connector. Sometimes the contacts can be returned with a needle to their previous spring-loaded state.
Electrical problems
Like any other USB device, the keyboard is powered directly from the port. And since the features of the internal implementation of the bus are such that several connectors are connected to one control microcircuit at once, then when powerful devices (with a current of 500 mA) are turned on, their performance is not guaranteed. The solution is simple: if the question arose "why the keyboard does not work on the computer", then you need to disable all USB devices, except for the most necessary ones, and check the functionality.
With a large number of simultaneously used USB peripherals, you need to use an intermediate splitter with an external source. Also, quite often the problem with USB is observed in old computers and laptops, power supplies and other elements of which have exhausted their resource and do not produce the required voltages. The solution is similar to the above. And, of course, do not forget that the malfunction may be in the connector itself: to check, you need to connect the plug to another USB port.
Software glitch
Modern operating systems use a driver control program to interact with the keyboard. Sometimes it stops working correctly. As a result, the user cannot understand why the keyboard on the computer does not work. You need to use the mouse to go to the "Device Manager" and try to update the driver in the "Keyboards" item. If it doesn't help, then you need to remove the device using the appropriate command and reconnect the keyboard to the computer - the Plug & Play mechanism should work.
An incident of settings
In modern BIOS motherboards there is an item that allows you to abandon the use of USB by setting the Disable mode. If for some reason this happened, then you need to find an old PS / 2 keyboard, use it to enter BIOS (Del button immediately after power is applied) and enable USB. Another option is to reset the settings to their initial state by closing the corresponding Clear CMOS jumper on the board (its exact location is indicated in the instructions). Newbies sometimes face the fact that the keyboard on the right does not work. This can be caused by accidentally pressing the NumLock button to toggle between the modes of the right number pad. If the indicator of the same name is on, then it is necessary to switch it to another state by pressing the button again.
Why the computer keyboard does not work
Each computer user may have a problem with the keyboard, and in this case, you need to find the answer to the question: why the computer keyboard does not workand how to fix it. There are many different reasons that lead to keyboard malfunction, but they can all be divided into two categories: software reasons and hardware reasons. Speaking more simple language, either the keyboard itself is faulty, or the problem is caused by a settings failure operating system... Let's consider the most common "symptoms" of the problem.
Dirty computer keyboard
It may happen that the keyboard as a whole works, but some of its buttons are unresponsive or sticky. The reason for this is quite simple - computer keyboard contaminated. The way out is obvious: the keyboard needs to be cleaned. To do this, you need to disassemble the device, it doesn't matter what type it is (wireless, standard or USB). Just grab the keyboard, flip it over, and remove the screws to remove the bottom. Do this all very carefully. Carefully remove the bottom and examine the contents. You will find that each key "sits" on a soft, thin rubber pad. This overlay can be displaced from its place, as a result of which the key does not function. Just arrange the covers and buttons in place. If the pad is torn, it must either be replaced, or very carefully glued. Dirty buttons need to be cleaned. Wipe them down with whatever cleaning agent you like and reinstall.
In addition to keys and overlays, you will find a translucent film and a board. They should not be touched. Tip: in order not to confuse where which button is located, you either take a photo of the keyboard in advance (of course, its front side), or take out the buttons one at a time and do the next only after the previous one has been cleaned and replaced. As for the overlays, they are all exactly the same, so you can arrange them in any order. Please note that these linings are very "nimble" and easily crumble. Therefore, work carefully.
Keyboard not working on computer: plug problem
If you have a regular, traditional keyboard that has a circular plug (usually purple), keep in mind that its thin legs may bend. This happens when the plug is forcibly or incorrectly inserted into the connector. When the keyboard does not work on the computerbecause of the plug, you can easily fix it yourself. Take hard tweezers or fine pliers and straighten the legs.
Broken USB keyboard
If you are having problems with your USB keyboard and you know for sure that it is not dirty, but nevertheless does not work when connected, the problem here is usually related to the BIOS settings, or SETUP. When the keyboard on the computer does not work what to doand what to do in this case? Fixing the USB problem is also not difficult. You need to do the following:
- when starting the PC, press Del (or F6);
- find in the menu settings "CMOS Setur Utility - Copyright (1984-2888 Aaard Software)";
- switch "Disabled" to "Enabled".
Everything is simple, except for one thing: in bIOS settings (SETUP), the mouse cannot be used, and therefore, at startup, Del (F6) cannot be pressed. The only way out is to ask a neighbor or friend for a keyboard for a few minutes.
Broken wireless keyboard
If you have wireless keyboard, first make sure it is charged. If everything is in order, then the point is different: Windows for some reason is not able to install drivers for such a keyboard. In this case, you will have to search for drivers yourself - on the Internet.
But it can also happen that some software that you recently installed corrupts your keyboard drivers. This happens "unconsciously", and most often the system itself restores the "lost" drivers, especially if it comes about Windows 7. But it happens that the driver gets corrupted and cannot be restored, and the "freshly downloaded" driver does not work well. In this case, you can do one of two things:
- Restore the OS by "bringing" it back to the day when your keyboard worked normally;
- Go to "Device Manager", view the properties and diagnostics of drivers and update them.
You may run into a situation like this where your keyboard buttons do not work in some specific program or a game. You need to go to the settings of this game or program and study the button assignments. Usually, in games, keys are reassigned, and programs have a list of hot keys.
If your PC makes a distinctive sound three times when turned on, this means that the keyboard is not connected correctly. Remove the plug and re-insert it carefully.
Can help you computer keyboard on screen, if you urgently need to type text or perform some other manipulations. The electronic keyboard has the same functionality.
If the keyboard stops working, it is advisable to test it on another computer deviceto make sure that the breakdown is in it (or not in it). Then proceed accordingly.
Enjoy your work and good keyboard!
Keyboard Problems computer easier to solve - there is always a possibility check the keyboard used on another computer or vice versa - connect it to your PC exactly serviceable... Then act according to the circumstances.
FROM laptop a different situation - the keyboard is built-in, that is, an integral part.
Anyway, first of all try reload device and go to BIOS (usually the key F2 at the time of initialization for laptops, Del or F10 for stationary PCs). It didn't work - chances are high device malfunctionmost likely you will have to contact service center... Before that recommend check contacts - maybe they oxidized or wrung out (relevant for PS / 2) or check cable integrity - he may have received damage (for example, it was pinched).
If you succeeded - therefore, the keyboard serviceable, we are dealing with a software glitch.
In this case, boot the system, it would be better to do this in safe mode without starting the drivers ( F8 while loading). The device is functioning - it means the driver is the problem. Start the OS in normal mode, right-click on the icon Computer – Properties.
Find the section Keyboards and delete whatever is in the subsection. 
Then reboot computer and check if the keyboard is working. In normal state, the driver should install automatically... Here in Dispatcher can be updated or reinstall driver - this option is suitable if there is a designation of unidentified devices with a yellow exclamation mark.
The next option is system rollback to the restore point to the date when the keyboard worked exactly.
For this we go Start/ Control Panel 
Run the program here Recovery.
Running system recovery - choose pointto rollback to.
In a more radical way, complete reinstallation operating system.
Introduces characters when broken keyboard you can use screen application.
Start/ Special abilities.
By clicking the cursor on the image of the virtual keys, information will be entered.
This is a temporary measure will simplify search and solution of the problem. For a laptop, another temporary solution would be connection an ordinary USB keyboard to any free port.
For more advanced users, you can of course disassemble and check connection loop. We will not dwell on this in detail in this article. 
The numbers on the right don't work
If only the numbers on the right do not work, first of all check if Num lock, some users may forget to enable it. 
Above is the normally enabled Num Lock mode illuminated the green LED is on (in rare cases, it may not be).
If the numbers still do not print, check to see if the Num Lock button actually performs this action. Sometimes this mode includes a combination Num Lock + SHIFT or another.
Also check if your option is not enabled mouse control from the keyboard.
Start\ Control Panel\ Special abilities\ Mouse
There should not be a tick on the item “ Keyboard control«. 
F1-f12 keys not working
If we are talking about laptop owners, the key is responsible for turning on the function keys. Fn.
Some types of PC office devices have a “ Office", You need to check its work. In other cases, it should help reinstallation drivers.
Hello.
Today I am writing instructions for those who do not have a keyboard on a laptop. I will describe the reasons why this could happen, how to try to solve this problem to make the keyboard work, I will show a temporary solution, how you can do without the keyboard and give some more tips.
Video: The keyboard does not work on a laptop
Testing the keyboard via BIOS
First of all, look at how the keyboard behaves when you turn on the laptop. Try to go to BIOS. When starting the laptop, immediately start pressing the Delete or F2 key (depending on motherboard). If the entrance to the BIOS is completed, then the keyboard is working. You can walk through the BIOS menu and make sure that everything is in order with the keyboard.
Faulty keyboard
If the keyboard does not work in the BIOS either, then there is a possibility that it is completely out of order, but not a fact. Think, was it such that the keyboard was poured with tea or beer for a couple of days? And if the keyboard worked in the BIOS, then this is most likely a software malfunction and must be solved through Windows.
Reinstalling drivers
Click on the Computer section and open Properties. Next go to device Manager.
Find the Keyboards section and delete everything under a clean one.
The driver will be removed! Now restart your laptop and check if the keyboard is working.
System Restore
It happens that some programs or we ourselves messed up the system, installed something wrong, or, on the contrary, deleted important files and Windows now does not work stably. The keyboard on a laptop may also not work because of this. I suggest doing a system restore!
Open Start - Control Panel... Select the icon display type Small icons and find the Recovery program.
We carry out Launching System Restore.
We select a restore point for about the date when the keyboard worked and click Next.
This will rollback and the laptop will reboot!
In any case, for now, text can be typed using the virtual keyboard or as it is also called.
Open the search bar and enter a query (or Start - Specialist. opportunities -). Run the found program.
Now we can type text with it. For example, I opened a notepad, put the mouse cursor and started clicking on the letters of the on-screen keyboard with the mouse. Typing went.
You can also do with search bar Yandex.
But I must tell you that not some sites already have their own on-screen keyboard. On the home page Yandex it is to the right of the form.
Click there and such a beautiful keyboard is launched.
Naturally, it will only work on Yandex, to enter a query into the search bar.
By the way, Google also has its own screen, so if your keyboard does not work on your laptop, then at least you can find something on the Internet and type text into your notebook.
Connecting a USB keyboard
If it was not possible to restore the keyboard built into the laptop, then you can connect an external one. Yes Yes exactly! Keyboards that are designed for computers will easily fit into laptops as well. The main thing is to choose a USB keyboard, because hardly any laptop today has a PS / 2 port. And here USB connector is on any laptop.
That's all. I hope by some of the options you managed to solve the issue with the keyboard. See you in new lessons!
