PC connector does not work. USB ports do not work. Software solution methods. Frequent causes of laptop connectors

Connected to system units via serial (COM) and parallel (LPT) ports. Standards were fairly simple in the implementation, which was most positively affected at the cost of motherboards and external equipment using the specified interfaces. The shortcomings were the impossibility of connecting the peripheral devices "on the go", without turning off the power system, as well as a small bandwidth. However, this was a kind of payment for "low cost," and before the era of Multimedia, no one for these features with the beginning of active distribution (digitization and voice, image) was designed to think about replacing COM and LPT. The result of several large companies was the appearance in 1996 of the first version of the USB interface (universal sequential tire), which allowed the speed scaling and supported the hot connection of Plug & Play. Since then, several generations of the standard have changed, and at the moment version 3.0 is actively promoted. Unfortunately, despite all the efforts of developers and versatility, so far many owners of computing systems sometimes notice that USB ports stopped working. And with no apparent reason. What is interesting: the USB port device is very simple: there are only 4 wires in the plug (sometimes 5, the fifth - screen), on two of which data is transmitted, and the remaining two are used for power supply.

Repair or service

Everyone knows that to ensure uninterrupted operation of electrical appliances, it is necessary to periodically perform an audit. The washing machine must be cleaned, dust should be sewn from the TV ventilating grilles, and the mobile phone is to charge and clean from unnecessary programs. But the computer, as a rule, is a "thing in themselves": after installing the system unit, it is often touched by feet, cleaning radiators do not produce, and that in the bearings of fans, even sometimes should be addressed by oil, in general, few people have heard. Is it worth wondering what time comes when USB ports suddenly turn off? Fortunately, in 90% of cases, it is possible to restore performance independently, without a hike to a service center and unplanned costs.

Basic input and output system

For any failures in the operation of the serial universal tire, you must check the settings in the configuration program of the motherboard. It is present in both portable and stationary computers: performs testing key blocks and initial configuration of operation modes, including the ability to lock USB. This program is called BIOS (basic I / O system). In modern systems, it was replaced by UEFI, but the main principle of functioning was preserved. Obviously, each computer owner is simply obliged to know how to enable USB ports in the BIOS motherboard. Otherwise, a minor failure or someone's joke - and you have to go to the service center, although everything can be solved on your own literally per minute.

Fabric configuration

To get into the BIOS, it is necessary immediately after switching on many times press the Delete button. On laptops, this function can be assigned to F2, as reported on the screen with the logo (by pressing the pause, you can read the inscription).

Unfortunately, telling about how to enable USB ports in Bios, we cannot describe the accurate algorithm of actions, because, depending on the implementation of the configuration program, the placement of items will be different. The user must "go through" around all the branches of the menu, looking for the USB controller control, or take the instruction bookbook to the board and use it to find a link to this item. So, if USB ports stopped working, then on some boards you need to open Advanced Bios Features and find USB settings. By clicking on the Enter string, you can select the status of Enabled / Disabled or ON / OFF. Use must be allowed. On other motherboard, go to the Integrated Peripherals item and find the ONCHIP state - Enabled. It is also useful to verify that Legacy USB Support is also involved. So, summarize the BIOS: The user's task is reduced to activating the controller of the universal sequential tire.

Register of the operating system

Windows allows on the program level to prohibit the use of ports by changing only one digit in the settings. However, it works only for those devices that have already connected on this computer, and the driver for USB ports were installed for them. For the prohibition / unlocking the operation of the tire follows:

Press the Win combination (button with the "window" symbol) + R;

In the appeared string, dial Regedit (Run);

Proceed on branches to HKEY_LOCAL_MACHINE \\ SYSTEM \\ CURRENTCONTROLSET \\ SERVICES \\ USBSTOR;

Find the START string and with a double click of the mouse to change the value from 4 to 3. This is a normal mode of operation. Changing the top three on the four, on the contrary, it will disable USB.

Changes will be noticeable after rebooting. We do not recommend, without the need to "play" with this item, since problems with the mouse and keyboard connected to the appropriate connectors may occur.

Connecting USB ports on personal computers

For the convenience of working with the system unit, part of the connectors are removed on the front panel of the case. In particular, these are sockets for speakers / microphone and USB. Indeed, it is very convenient when connecting the corresponding periphery does not search for a free connector on the reverse side of the system unit, and use the easily accessible jacks. At the same time, this implementation has a disadvantage that consists in the fact that the connection of USB ports of the front panel is carried out using a cable stretched inside the housing to the comb cover on the motherboard. Hence the problems. The USB cable must be made not from a muster conductor than sick cheap buildings of Chinese origin, but fully comply with the requirements of the resistance, the quality of soldering / crimping, length, etc. connectors on the reverse side are directly soldered to the board and, as a result, more reliable. .

So, if the USB ports have stopped working on the front panel of the system block of the USB port, then you need to remove the housing cover, find the USB comb cover with the connected loop (signed), gently disconnect the pins and plug and reinstall the connection. Sometimes it is very effective easy to reconnect to the next comb. For example, if the train went to USB 5-6, then it must be attached to 7-8.

By the way, the problem with the front panel connectors is one of the most common. If there is no time to open the case, then the periphery can be connected to the sockets on the rear wall.

"Food is filed", or a problem with nutrition

Although the specification to the universal serial bus states that the maximum current to the port is 500 mA for the second version and 900 mA for the third, this does not mean that all the connectors can simultaneously connect devices with such consumption, and everything will work. Moreover, it is the shortest way to problems and the question "Why USB ports stopped working." All modern boards contain a built-in universal tire controller, which, in simple language, manages all the relevant connectors. Physically, this is an electronic device that has the ability to directly access the assigned interrupt and is able to partially release the central processor from the routine data streaming operations. With a large number of ports of controllers, there may be several. The more devices are connected to the branch, the higher the current load on the controller. And upon reaching a certain value, a banal nutritional shortage begins, manifested in failures, failures of the connected devices and even the output of the controller is due to overload.

By the way, the USB cable bought in the market for pennies, with which the "powerful" device is attached, can have a significant internal resistance, which worsens the situation with nutrition. The connected peripheral component can simply not work properly due to voltage loss in the conductors of the poor-quality cord.

Thus, if, for example, the printer's USB port does not work, then you need to make sure that the communications wire of the appropriate quality is used, and any other device is connected to the board on the board. So, almost certainly there will be problems because of the power supply if the printer is turned on in one port, in the next - external DVD (without its own block), well, and in the third "works" a Wi-Fi transmitter or that is completely bad, a hard disk.

How to overcome the current load limit

"To force" the controller skip through itself a current greater than the one for which it is designed is impossible. Therefore, in case of failures in the operation of peripheral USB devices, you can go a few ways:

Disseminate components by different controllers, that is, the printer is connected to another connector that is adjacent to empty;

Attach the most "voracious" devices to USB 3.0 ports;

Use external hub with active nutrition. This device is an analogue of a tee for the power grid (branches the line). It connects to the free computer, it is supplied to it from its own source, and the rest of the peripherals turns on to the ports on the hub. Very convenient solution. The disadvantage is that a free outlet and additional purchase money are needed.

Driver is not a luxury ...

Now there are many boards in the market, in which, in addition to USB 2.0, there is a newer standard - 3.0. And, although it is indicated about the versions, it is not fully implemented. The USB port device is such that it is necessary to install the driver in the operating system. Unite. This is a mandatory requirement. Thus, if the computer owner connects the USB 2.0 device into a third-version port connector, but at the same time will forget the package of control programs to support, no one guarantees normal operation.

Problems with contacts

There are four spring-loaded copper tongs inside the USB bus plugs. It is due to them that contact with the contact pads in the connectors occurs. With frequent use, the contact is broken, and failures begin. To solve the problem, you need to return the arc of the bending of the tongue with the help of a needle or replace the interface cable new.

Cleaning inside and outside the system unit

Very often, an externally, the computer looks clean, but entire deposits of dust are found inside the housing. Ports are subject to contamination. Household dust does not spend current. Therefore, if the USB port stopped working, you need to carefully clean the connector, blowing the dust with the help of a script. It must be remembered that external and internal purity are different things. The system unit requires periodic revision with cleaning and purge.

If it does not initialize it when connecting the device via the USB interface, it is not determined by the operating system and does not give any messages at all, then the reason in disabled The controller responsible for this port.

The first thing to do is look Public status B. Device Manager. To start it, enter in the window Perform (Win + R) command " devmgmt.msc.».

Open section USB controllers And look state USB Hub or root USB hub.

In the picture, one of them is shown disabled. Turn it on with the right button - Cycling.

You can also go to the section properties - Tab Power management, Remove the checkbox with permission to disconnect the power supply devices.

In the same properties you can check relevance installed drivers, refresh them if necessary.

If the controller is marked yellow exclamation familiar, then try reinstall its driver, or delete all controllers and execute reboot Systems, after which they must automatically install and work properly.

All ports do not work

If all ports are not working at once - reboot computer and go to Bios. (key F2. or del. at startup). Depending on the type and version of the BIOS settings can varyYou should find the parameters " USB Function."And" USB 2.0 Controller", They must be in the" Enabled." Most often they are in the section " Onboard Devices Configuration.»

Only front connectors do not work.

If we are talking about a PC, then it should be distinguished front and rear Connectors. The rear are located directly on the motherboard, the front is connected to it using a special clay. Therefore, when the front USB stopped working, first of all check out The device is working when connecting to the rear.

If it is working, then you will have remove the lid system unit (when the computer is turned off) and then check the correctness of the connection The front connector loop to the system board.

Right plotovka connections can be found in the description of your motherboard, but usually how to connect clearly by signs on the motherboard.

If a problem with a phone or player

Refusal in normal operation of the audio device on the phone or player associated with the headset connector manifests itself, as a rule, thus:

loss of sound, if you do not hold your hand plug in the headphone jack;
strange noise and / or crackling when playing a sound file;
the absence or partial loss of sound in one of the headphone housings (left or right);

To exclude malfunctions directly by the headphones and make sure that the headset connector does not work, connect the headphones to another, serviceable, source of the audio signal. With their normal work, it is possible to say complete confidence that the breakdown is not related to headphones.

To make sure that the problem is in the headphones, connect them to another device.

In this case, 4 types of faults are possible:

mechanical damage to the connector;
oxidation of contacts or short circuit in the electrical equipment of the audio device;
damage to the board or other parts of the audio player. To accurately establish the cause of the fault, it will be possible only after disassembling the case;
the incorrect operation of the gadget software, which is treated with the battery charging (rarely), the usual reboot (sometimes) or repeated "firmware" (a positive result is committed to 100%).

Some of the above faults can be corrected independently, well, if it does not work, you will have to give a mobile device to repair or replace the audio device.

If the connection to a serviceable sound source showed that the headset does not work, there are 3 options for:

return headset to the store or free warranty repair;
repair for your money or independent correction of the defect in the presence of the necessary skills;
buying new headphones.

If a problem with a laptop or computer

If the headphone connector does not work on a PC or laptop, be prepared for troubleshooting, you have to deal with the device software. So, why is there no sound when you insert the plug into the appropriate hole on the laptop case or system unit?

Perhaps the problem is that the motherboard simply "does not see" the connector to which you are trying to connect. In this situation, the disassembly of the PC system unit or the laptop housing is also helpful with the subsequent connection of the required periphery. It is easy to do it yourself. Well, if you really have a teapot - you will have to call a specialist.

Video: why the front ports of the computer do not work

Silence in headphones may also be due to the lack of system connection of the selected connector. To troubleshoot a malfunction, you will need to go to the settings and allow the system to see an audio device with a standard 3.5mm plug.

Perhaps there is a "glitch", which often happens with this kind of technique. Try changing the default playback device. There is a chance that the problem is associated with the virus or incorrect software work.

A malfunction can be associated with the lack of or damage to the drivers of the sound system of your laptop or PC. It's no secret that any of the versions of Windows (even the latter) can "lose" the driver for nothing with this. When downloading a new software, use the official website of the equipment manufacturer.

Everything is fixable, if you understand that there are no unreserved problems. The main thing is not to lower your hands, but to look for how to solve them.

A familiar situation when the headphone jack does not work? We picked up five possible solutions non-working 3.5-mm mini jack in a smartphone.

So that you do not think this problem is not at all uncommon. A bunch of smartphone users faces this problem, and they can be very upset, especially those who often listen to music.

1. Make sure your headphones are not broken

The most obvious reason. It is possible that nothing happened to the headphones, and the problem is not in them. It can be easily verified. Just connecting headphones to another device. Not necessarily to the smartphone, it can be a laptop, a TV or any other device with a 3.5mm connector on board.

If you do not hear the sound when using headphones with another device, then you have discovered the problem.

Just replace your headphones. In case they work with another device, the reason is something else. This means that you need to try one of the other solutions listed below.

It is also recommended to connect another pair of headphones to your smartphone to make sure they work. Although it is rare, there is still a possibility that they may be incompatible with your smartphone for some reason, but work with different other devices.

For example, 5-pin headphones may not work in smartphones in which the 3-pin mini jack connector is installed.

2. Check if the smartphone is connected to another device via Bluetooth

If your smartphone is associated with wireless headphones, a speaker or any other device via Bluetooth, it is possible that the mini-jack for headphones is disabled. Usually, when you connect headphones, the smartphone must recognize them, and everything should work on the destination, regardless of the Bluetooth settings. However, this happens not always.

This is a quick and easy solution, since everything you need to do is open the settings menu on your device, find the Bluetooth option and check whether it is enabled, and the smartphone is not associated with one of the other devices that you have in your home .

If so, simply turn it off, connect the headphones and see if it will not solve this problem. If they still do not work, just go to the next solution in this list.

3. Clean headphone jack

As you can imagine, a lot of dust, as well as the Village can break into the headphone jack over time. This may be the cause of the problem, since the dirt can actually block the connection between the headphones and the socket.

The first thing you need to do is just look into a 3.5-mm mini jack to see how dirty it is. The flashlight does not hurt.

The next step is to try to clean it and hope that it will solve the problem. There are many different ways to do it, some of which work better than others. One of them is to just clean with something (needle, for example) a headphone nest, it will at least solve the problem on the dust part that is inside. You can also use a squeezed aircraft if you have it

Excellent option - using a cotton swab. Put it in the nest and tighten it a little to remove dust from there. Be very careful because the last thing you want to do is harm the device. You can also wet your cotton swab with alcohol, but make sure you do not use it too much.

After you finish, look at the headphone socket again to see how much dust and dirt you could remove. Connect the headphones to check whether everything works as it should.

4. Check the sound settings and restart the device.

It is also likely that the problem is not related to the socket or headphones that you use, but with the sound settings of the device. Just open the sound settings on your device and check the volume level, as well as any other settings that can disable it.

Usually there are not many settings on the smartphone, so you should immediately find the cause. If there is, that is.

If everything seems to be in order, there is another simple solution that you can try - just reboot your device. Sometimes it can solve many problems associated with smartphone software, and takes less than a minute. Just press and hold the power button, select the restart option.

5. It's time to go to the service

If none of the solutions listed above does not work, this means that the problem is significant than expected.

If your phone is still under warranty, it is best to simply contact the seller or manufacturer, explain the problem and send it to repair or replace. In some cases it may take a long time, but at least it is free.

The second decision is definitely the worst thing is to return the device to the manufacturer or someone else who knows what he does.

You will need to pay the problem to be fixed, but at least you can use the headphone jack again.

Otherwise, you can simply choose wireless, which will also solve the problem. Well, it seems like.

***

Here are some of the solutions that we hope will help solve the problem that has arisen with your headphone jack on your smartphone.

If you think we missed any of the solutions, write to us about it in the comments.

The presence of USB connectors allows you to connect a wide variety of external devices to a laptop, from flash drives to printers and scanners. This method of connection is very convenient, so USB connectors are almost on all modern computers, including laptops and netbooks. Unfortunately, sometimes they can fail - with the next connection of the external device, the user can detect that it cannot be done.

Why USB connectors stopped working in a laptop

This question is asked by each user who collided with this malfunction. All causes can be divided into two types - software and hardware. In the first case, we are talking about software failures, while the causes of these failures may also be different. For example, external ports can be disabled with viruses. Damage or lack of relevant drivers files can also lead to their inopecy.

There is a very simple way to check the help of the computer hardware: if you work under Windows, download the computer from the boot disk or flash drive with the Ubuntu operating system (demo mode, without installation). It can be downloaded completely free of charge, while the OS easily "picks up" the overwhelming part of modern computer equipment. If Ubuntu ports earned, then Windows is to blame. Not earned - the reason is hardware.