1 usb port not working on laptop. How to turn on the wireless adapter (on a laptop)
Hello dear readers! Every time you start the computer, all devices installed in the computer are initialized, data about drivers and various utilities are read. But, sometimes there comes a time when the device connected to the personal computer is not detected by the operating system.
It is at this moment that we have an anxious moment, and we ask ourselves: why does not workUSBport? What exactly is the matter and what needs to be done to make the port work? In the end, as they say, there is a way out. But first, let's figure out how everything works and what the essence of this material is.
So, many of us, when working at a computer, use the USB port all the time, as if it is impossible to do without it, although in fact it is. In computers, as you know, USB ports are present not only on the front panel, but they can also be seen on the front panel of the system unit case, for example, in a card reader.
So now the USB port is the heart of the system, so to speak, the exchange of information that can be transferred at any time to the PC system available at that time. I am already silent about the fact that with the help of ports it is possible to enter data into a computer (mouse, keyboard). The location of ports on a personal PC is always different, it is worth adding that in advanced systems, gaming platforms, additional USB ports are installed.
As always, as it usually happens, one day there comes a moment when the USB port does not work, that is, the USB port simply hangs, is buggy, is not detected by the system, or rather, it does not work correctly. I suggest that in today's article you consider the causes, as well as ways to fix a non-working USB port.
We wonder why the USB port does not work?
Firstly, if when you connect a flash drive to a computer or some other equipment, the port does not work quite correctly or the device connected to the computer is not detected by the system at all, then in this case you should make sure that the controller on the PC is turned on motherboard.
Quite often, users forget to turn on the USB controller. It seems to be a simple, but still common problem when the user started the PC, but the device was not detected. It is possible to fix everything here, for this you need to go into the BIOS and enable the corresponding parameter. By the way, if you do not know what BIOS is, then I recommend that you definitely read the article
So, go to the BIOS, find the item "Integrated Peripherals - this applies to the Award BIOS", or in the Ami BIOS - Advanced".
Next, press "Enter" and go to "Onboard Devices Configuration" and make sure that the items "USB Function" and "USB 2.0 Controller" are in the "Enabled" position. If so, then everything is included. Otherwise, the parameter can be turned off (OFF), position "Disabled". If the option is disabled, then enable it. Next, save the changes, then reboot the PC system and check the USB port is working. Be sure to check if the USB ports on the front panel of the system unit are connected to the motherboard itself using the so-called block.
If the port still does not work, then move on.
Secondly, or maybe it's the inoperability of the port and is completely hidden in the USB extension cable? For example, there are situations when the computer does not recognize a peripheral device (printer), for the simple reason that the USB cable itself is simply damaged. The reason for cable damage can be very diverse, for example, you accidentally put a chair on a cable or some heavy object and simply pinched it. Therefore, do not be too lazy to check the cable itself.
Thirdly, it is quite rare to encounter such a problem when the USB port does not have enough power. I will give you a concrete example. Imagine that you have connected a USB flash drive and a printer to the front of the case of the system unit in the USB connector. As a result, the operating system, when sending data for printing, informs us that the document could not be printed. In general, your computer simply does not see the printer. And if you restart your computer, the printer is detected by the system, and you can easily print a document. However, after a while, the computer loses its connection to the printer again and the printer does not print. Do you know why?
Such a seemingly banal problem at first glance is due to the fact that there was a lack of power for the USB port. As a result, the USB port refuses to function properly. Basically, such an incident associated with a lack of power occurs when connecting several devices to the front panel USB ports.
Of course, not always, but such situations do occur. These USB ports are connected to the motherboard with a cable. This cable, in addition to data transfer, also provides power to the USB hubs themselves. It is possible that the power supplied to two devices connected to the USB hub at the same time may not be enough. In this case, I can recommend that you connect the printer to the built-in USB port, which is located on the PC motherboard.
You can also change the CMOS battery on the board. It happens that the problem disappears completely after replacing the battery on the motherboard. What is this battery and where is it, you can find out in this article:
In general, if you does not workUSB port, which is located on the front panel of the system unit case, then try to replace the USB hub itself. Who knows, maybe it is he who is faulty.
You can also try plugging the cable into a different USB port on the motherboard.
Fourth, if the USB port controller, which is responsible for detecting and starting the device itself, still fails, then things are, of course, bad. There is, of course, the opportunity to take and solder the controller itself on the motherboard, but this takes time, you need to have the controller itself, and, of course, the soldering station. From the point of view of time costs, it is not quite reasonable. Another option is to entrust it to specialists, although there are also some pitfalls here, the price, the quality of work, as well as the competence of a specialist who specifically works on this problem.
Fifth, peripheral and mobile devices may not be recognized on your computer due to the lack of drivers and special software. It cannot be ruled out that if you have been using your operating system for quite a long time and the system has not been updated at all, and indeed the Windows build is not the original version, then in this case it is the case that the drivers are already considered outdated and therefore the system freezes happen all the time.
Sometimes Windows disables the USB hub altogether to save power. To prevent the USB device from being disconnected, you need to do the following.
Open the "Device Manager" by right-clicking on the "Computer" icon and selecting "Properties".
After the Device Manager window has opened, double-click the left mouse button on "USB Controllers", expand the branch.
Now you just have to go to the root USB hub and uncheck the box in the "Power Management" section, as shown in the figure below.
At sixth, sometimes reinstalling the operating system helps fix the problem when does not workUSBport. Although, of course, first try to roll back the system to a previous state. Here is an article that will show you how to do it:
Seventh, perhaps your system has some kind of faulty equipment, which just the same serves as an obstacle to the normal operation of the USB port.
This problem is very relevant in our time. After all, quite often users directly encounter this. So, there is a solution. USB ports can hang on the computer, contacts can close, and many more additional problems can occur when working at the computer.
We find a way out of our situation, check all devices for connection and disconnection. You will need to disconnect all devices and connect one at a time, for example, connect the keyboard first and see if it works, then connect the next device, let it be a mouse and so on. Connect additional USB devices, if they don’t work, then the problem is solved or you need to look in peripheral devices, maybe something is shorting there, but you never know.
Eighth, generally forgot to enable the serial bus controller in the device manager. There are moments when you do not pay attention to the work of USB devices, turn on the computer, download music, listen and enjoy new works of art. True, everything comes unexpectedly, suddenly a USB device was needed, and then silence, it does not work. The thought immediately comes to mind, maybe the controller is not turned on, let's take it and check it, it is.
Each PC has a device manager that shows which devices are connected, whether all drivers are installed and updates are made.
In general, I think that you probably already know that in the absence of any driver, the system automatically marks it with a yellow exclamation mark, this means a malfunction, as a result, with two mouse clicks, an additional window opens, information about the code is displayed here malfunctions and the possibility of its recovery.
Ninth If all of the above methods did not give a positive result, then I recommend that you install a USB PC controller on the motherboard.
If your computer has a low-power power supply, for example, 300 W, then it is likely that the cause of all the troubles is hidden in it, install a more powerful power supply, say 500 W, and check if the USB ports are working.
Concluding today's article, I would like to say that it is not always possible to easily find the culprit of all problems, sometimes it is not enough just to reinstall Windows to find out what really happened.
If there are no drivers for the serial bus controllers and the controllers themselves are marked with an exclamation mark, then you should either install the drivers for the controller, or you can remove all the controllers and restart the computer. After the computer boots, the system will try to install them again, and it is possible that all USB ports will work properly again.
So, summing up today's article, we can only note that if the USB port on the computer does not work, then the cause of all troubles can lie in both hardware and software stuffing. In general, everything I wanted to tell you about today, I have said.
How do you like today's article and what can you add to all of the above? In the next issue you will find out =>
Probably, many users, when connecting a USB flash drive or other peripheral device, faced a problem when the computer does not see them. Opinions on this matter may differ, but provided that the devices are in working order, most likely the matter is in the USB port. Of course, additional sockets are provided for such cases, but this does not mean that the problem does not need to be solved.
To perform the actions described in the article, it is not necessary to be a computer genius. Some of them will be quite banal, others will require some effort. But, in general, everything will be simple and clear.
Method 1: Check Port Status
The first cause of port failure on a computer may be clogged. This happens quite often, since usually there are no plugs for them. You can clean them with a thin, long object, such as a wooden toothpick.
Most peripherals are not connected directly, but via a cable. It is he who can interfere with data transmission and power supply. To check this, you will have to use another, obviously working cord.
Another option is a breakdown of the port itself. It should be excluded even before the actions described below. To do this, insert the device into the USB socket and shake it slightly in different directions. If it sits loose and moves too easily, then most likely the cause of the port inoperability is physical damage. And only its replacement will help here.
The simplest, most popular and one of the most effective methods for troubleshooting all sorts of computer problems is to restart the system. During this, the memory, processor, controllers, and peripherals are given a reset command, after which they return to their original states. Hardware, including USB ports, is rescanned by the operating system, which can make them work again.
Method 3: BIOS setup
Sometimes the reason lies in the settings of the motherboard. Its input and output system (BIOS) is also capable of enabling and disabling ports. In this case, you need to enter the BIOS ( Delete, F2, Esc and other keys), select the tab "Advanced" and go to point "USB Configuration". Inscription "Enabled" means the ports are enabled.
Method 4: Update the controller
If the previous methods did not bring a positive result, updating the port configuration may be the solution to the problem. For this you need:
The absence of such a device in the list may be the cause of the malfunction. In this case, it is worth updating the configuration of all "USB controllers".
Method 5: Remove the controller
Another option is to remove "host controllers". Just keep in mind that in this case, the devices (mouse, keyboard, etc.) connected to the corresponding ports will stop working. This is done as follows:
In principle, everything will be restored after updating the hardware configuration, which can be done through the tab "Action" in "Device Manager". But it will be more efficient to restart the computer and, perhaps, after automatically reinstalling the drivers, the problem will be solved.
Method 6: Windows Registry
The last option involves making certain changes to the system registry. You can complete this task as follows:
File Start may not exist at the specified address, which means that it will have to be created. For this you need:
All the methods described above really work. They have been tested by users whose USB ports once stopped working.
Quite often, people come to us with a question - why the USB ports on a laptop or computer do not work. USB ports may stop working after reinstalling Windows, after updating drivers, or at any inopportune moment. Of course, the problem may be a malfunction of the USB ports, but before taking the laptop / computer to service center, you should check the settings to make sure that the problem is not in the software.
So, let's see what you can do in a situation where USB ports do not work on a computer or laptop.
Check USB ports
The first thing you need to do is check the USB ports for physical damage.
A simple test is as follows: insert a USB device into a port on a laptop and see if the connected device moves up and down easily. Be careful! You shouldn't pull hard on the USB port to avoid breaking it.
In case the USB port moves too freely, the problem is probably physical damage. You should contact the service center to replace the USB port.
To restart a computer
You can also try the good old method of any department technical support: turn off and on. Sometimes this actually works as the operating system rescans the hardware, including the USB ports, making them work.
If that doesn't work and the USB ports are still not working on your computer, then it's time to check Device Manager.
Check device manager
you can run Device Manager in several ways, but we will talk about the fastest: press the Win + R keys, and enter devmgmt.msc. Click "OK" or key « Enter». Device Manager should immediately appear on your computer screen.
In this window, we are interested in the section " USB controllers". Click on the arrow next to this label to expand the section. You will see something like the window below:
Here you should find a device that has the words USB Host Controller in its title. For example, in my case it is Intel(R) 5-Series / 3400 Series Chipset Family USB Enhanced Host Controller. Some letters may differ for you, but in general you should have a similar device. If it just doesn't exist, this is probably the problem why the USB ports on the laptop don't work.
In this case, you should right-click on " USB controllers» and select "Update configuration". The computer will recheck the hardware and you will see the USB Host Controller listed.
Remove USB Host Controller
Next, you need to be careful. If you are working on a computer, then most likely you have a USB mouse and keyboard connected. After you remove the USB Host Controller, your mouse and keyboard will not work. This is not a problem as they will work again after restarting the computer.
So, as you understand, you should right-click on the USB Host Controller device, and select " Delete". Perform this step for all devices named USB Host Controller.
After removing the USB Host Controller, restart your computer or laptop. After restarting, the computer will automatically install the necessary drivers for the USB ports to work.
Find registry key DisableSelectiveSuspend
If the USB ports are still not working, then we will go one step further and make some changes in the Registry Editor.
To go to the registry editor, press the keys Win+R, enter regedit, and press the " Enter". The registry editor window will open.
Next you need to find the registry key DisableSelectiveSuspend. It is located in the following folder: HKEY_LOCAL_MACHINE -> SYSTEM -> CurrentControlSet -> Services -> USB. Next, in the right window, right-click on the file " DisableSelectiveSuspend", and select " Change».
In field " Meaning» enter number 1 . This way you will disable the selective suspend feature and power will always be supplied to your USB ports.
If there is no USB folder
If the USB folder doesn't exist in your registry, it's easy to create it. Just go to the Services folder, then on the toolbar click " Edit»> « Create»> « Chapter". name it USB.
The most commonly used USB interface is also the most unreliable. To be more precise, devices that have entrusted power to the USB port are, to put it mildly, unstable. But sometimes there are completely, out of the ordinary, situations - usb ports stop working. Those. neither the mouse nor the flash drive is simply detected by the operating system. This can happen both with all ports, and with its individual representatives on the motherboard. Why is this happening? Let's try to figure it out...
« First of all, we look at the drivers »
There is a possibility of a problem at the software level. Are they installed and how do they work. For this you need to go to "Device Manager" and find something like "USB Controllers". All devices that are there should not be marked with exclamation marks. If this is not observed, for greater certainty, you can restart the "USB hub". Some recommend deleting all devices so that the system will detect them again after a reboot.
All devices are working fine
The last option is the easiest to diagnose. You need to check if the USB controllers are enabled in the BIOS. We go there using the del or f2 keys (in most cases). There, depending on the manufacturer, you need to find the item responsible for the operation of the usb. Usually it is called so - USB Controller. But not a fact. In any case, it’s not so long to go through all the BIOS items - you will find it. The value must be Enabled, i.e. included. Next, exit with saving the settings (save and exit or similar variations) and reboot.
« Not the last reason is a short circuit on the motherboard itself. »
Make sure that it does not hang loose in the case and is securely fastened. Try to avoid the formation of dust. If the case cover is open, then be afraid of static electricity - the case of failure of USB ports is real. If they “die” one at a time, then most likely the motherboard “fits” and you should prepare to replace it in the next 4-6 months. It is also worth considering that external screws from cheap manufacturers can also cause unstable operation of USB ports, especially those connected “cold”.
As a solution to the problem, PCI USB controllers have long been available, which are inserted into the motherboard slot. However, if the south bridge burned down, then this, of course, will not help. In general, it should be borne in mind that this device is an extra load on the PSU, the power reserve of which is not infinite. This problem is especially acute in the catering sector. Food service equipment consumes a lot of electricity. This applies to both refrigeration equipment and various self-service lines from professional manufacturers.
Thus, we have considered the main reasons for the inoperability of USB ports. The rest can be found on special "iron" forums, such as iXBT.
If, when the device is connected via the USB interface, it does not initialize, is not detected by the operating system, and does not display any messages at all, then the reason may be disconnected the controller responsible for this port.
The first thing to do look port status in Device Manager. To run it, enter in the window Run(Win + R) command " devmgmt.msc».
Open section USB controllers and look condition USB hub or USB Root Hub.
The picture shows one of them. disabled. Enable it with the right button − Engage.
You can also go to the section properties- tab Power Management, uncheck the box to allow turning off devices to save power.
In the same properties, you can check relevance installed drivers, update them if necessary.
If the controller is marked yellow exclamation mark then try reinstall its driver, or remove all controllers and execute reboot system, after which they should automatically install and work properly.
All ports not working
If all ports do not work at once - reboot computer and go to BIOS(key F2 or del at startup). Depending on type and version BIOS settings may vary, You should find the options " USB function" and " USB 2.0 Controller”, they must be in the position “ Enabled". Most often they are in the section " Onboard Device Configuration»
Only the front connectors do not work
If we are talking about a PC, then we should distinguish front and rear connectors. The rear ones are located directly on the motherboard, the front ones are connected to it using a special plume. Therefore, when the front USB stopped working, in the first place check operation of the device when connected to the rear.
If it is correct, then remove the cover system unit (when the computer is powered off), and then check correct connection front connector cable to the system board.
Correct pinout connections can be found in the description of your motherboard, but usually, how to connect is clear from signatures on the motherboard.
Other causes and solutions
If you are using extension or concentrator check the operation of these devices when connected to other ports or on a different computer.
If it's about broken connector USB 3.0, check if its special cable is connected to the appropriate connector on the motherboard.
Check drivers The devices themselves connected through the ports may be the reason for these devices, and not the connectors.
If none of the methods gave results, then this particular port or controller probably has mechanical damage that can be repaired at a service center.