How to turn on power to usb ports. Why don't the USB ports on my computer work? Main reasons. Selecting a boot disk

Causes of problems due to which they do not work USB ports on a laptop, can be completely different - from hardware failure to “lost” motherboard drivers or controllers themselves.

However, usually the user can cope with most problems on his own, without turning to specialists - if he knows how to do it.

If there are a lot of USB ports on the laptop (for example, 3 or 4), the problem may not be so critical, and its solution can be postponed.

But if there are only 2 connectors or there is a constant need to use connected devices - flash drives, and even printers - the issue should be resolved as soon as possible.

Moreover, some methods will take no more than a few minutes.

First Troubleshooting Steps

Termination message appears on screen USB operation-ports or lack of reaction from the laptop to a drive installed in the corresponding connector may indicate.

Sometimes you can solve them with a simple reboot - there is a small chance that the fix will happen automatically.

Increase the likelihood of the positive effect of a reboot, which actually sometimes helps, You can do it in a not quite usual way:

1 Completely disconnect the laptop from the power supply (if it was, for example, charging);

2 Remove the battery and leave the laptop in this state for about 5 minutes;

3 Insert the battery back and turn on the device.

If no messages about non-working ports appear on the screen, but the flash drive is still not readable or connected to the laptop peripheral device does not happen, it is possible that the problem lies with this equipment.

The assumption is tested by connecting gadgets to other ports of the laptop - or to another computer.

Other USB devices

Another one problematic situation with USB ports occurs when a large number of external devices are simultaneously connected to the laptop.

For example, a user has already connected three gadgets to four ports ( , and ), and then tries to install a flash drive as well.

Sometimes such a drive simply will not be detected by the system - and turning off 1-2 peripheral devices allows you to check the assumption.

Simultaneously connect a large number of USB devices and adapters to the laptop.

Most often, this situation occurs not when connecting peripherals directly to the laptop, but when using a “hub” (USB hub that increases the number of connections).

You can solve the problem by reducing the number of connected devices - or even better, by removing the hub and connecting all gadgets directly.

Incorrect BIOS configuration

You can find a list of ways to solve problems with USB ports.

Sometimes using this interface it is possible to enable system board self-switching controllers.

To activate, you need to perform several steps:

  • Reboot the system while pressing function keys to enter the BIOS (for some laptops this is F1 or F2, for others - Del or Esc).
  • Select the Advanced or Integrated Peripherals section.
  • Go to the USB Configuration menu item and change the parameter value in the USB Controller section (there may be several of them with different names) to Enabled.

BIOS interface settings.

After a reboot, the hardware configuration on the laptop will change, and USB ports that were not previously recognized by the system may appear to be working.

System settings

A laptop running on battery power can automatically turn off some controllers to save energy - especially if it approaches critical values.

In this situation, first of all, you should connect the laptop to the network, and then change the power settings, by following these steps:

1 Open Device Manager.

2 Select the branch indicating serial bus controllers.

3 Find and open the USB root hub subkey.

4 Double-click the properties of the hub and go to the power settings.

If the problem was incorrect settings energy consumption, due to which the laptop automatically turned off the ports, there will be a check mark in the box that allows turning off the power to the hub.

By removing it, you can restore the functionality of the ports.

The steps are repeated for each hub if there are several of them on the laptop.

Prohibits the system from turning off USB ports to save energy.

Driver problem

The problem may be - and in most cases it is - in problems with USB drivers.

You can find the problem by going to Device Manager(via computer properties or by typing in mmc devmgmt.msc).

It is possible that one of the ports is marked in the list with a special icon - a yellow triangle with exclamation mark, signaling equipment malfunction.

You can try the problem solve in one of 2 ways:

  • Try updating the drivers (preferably an Internet connection) in the properties of the USB controller.
  • Remove the device marked with a yellow triangle from Dispatcher And restart laptop.

When using the second option, the system rebooted will try to install a new one software for discovered “new” equipment. Sometimes this will restore port operation.

For the first option, you may need to find out the ID number by which the corresponding driver is searched on the Internet - this identifier is located in the device properties on the details tab.

Determining USB port ID.

The problem, which is the motherboard drivers not working properly (this usually happens with outdated laptops released several years ago), is solved by downloading and installing the appropriate software.

To do this, the laptop user first needs to find out - for example, use the AIDA64 application, which is paid, but works without entering a key confirming payment for a certain trial period.

The name of the device will help you identify and msinfo32 command, entered in the “Run” form (called by the Win + R keys).

Determining the name of the motherboard.

You can try to find drivers for the corresponding board on the website of its manufacturer - or on the resource of the company that developed the chipset.

You should know: If you don’t have the time and experience to find and update drivers, you can use the utility. After installation on the laptop, it will independently check and update all the necessary software. The disadvantage of using this method is that if you do not choose manual setting updates, the application will automatically replace drivers for almost every part and even update some programs - this usually takes a few hours.

A utility for searching and updating control programs and other applications.

Incorrect operation of the operating system

Replacing this part returns the port (or several connectors at once) to its normal state.

In order to encounter such problems as rarely as possible, the user should not connect a large number of USB devices to the laptop - especially using special splitters (“hubs”).

It's also worth including automatic installation updates in the appropriate section of Windows - usually this allows the system to independently solve problems with drivers.

If the USB ports on your PC are not working and Windows settings and driver updates do not help, perhaps the controller was disabled in the BIOS. In this case, you will need to go to the configuration menu and turn everything back on.

There are many different versions BIOS with its own interfaces and subtleties of operation. Also, a more modern complex can work on your computer - UEFI, which supports a full GUI interface. This article discusses the distributions that are most often installed on motherboards.

Entering BIOS settings

To start changing the configuration, you need to go to the corresponding menu. It can be opened during power on personal computer- before Windows started loading from hard drive.

Turn on your PC. In case it is already running: reboot. Wait for the speaker to beep: a short, single beep indicates that all internal components necessary for the computer to function have been detected.

Now you need to click hotkey to call the configuration. This must be done before changing the screen. If you don't have time and Windows starts loading, reboot. The keys depend on the model of the installed motherboard and the BIOS firmware version. You can find it in the user manual that came with the motherboard, on the manufacturer’s official website, or view on your PC screen when loading it:

If you don't know the board model, it's okay. Just try pressing the following keys: Tab, Delete, Esc, F1, F2, F8, F10, F11, F12. One of them will definitely do.

You don't have to try just 1 option at a time. You can quickly press all the buttons from the list without any problems. One of them will come up and launch the BIOS settings, and the rest will be ignored.

Entering the BIOS/UEFI settings of the latest PCs

Many modern computers boot up so quickly that you won't be able to access the keystrokes when you turn them on. This is also true for laptops. That's why latest versions Windows OS has a new launch feature. Let's show it using Windows 8.1 as an example.


Your computer or laptop will reboot into setup mode. After restarting your PC, you will also be able to select option to run from a USB drive or DVD.

Menu navigation

Almost all BIOS versions are devoid of GUI. This means that you will have to work only using the keyboard, as in, for example, Windows console. Navigation is carried out using the up-down and right-left arrows. To open any section, use the Enter key to go back - “Escape”. A small reminder of the keys used is always shown on the screen.

Firmware complex UEFI installed on the most expensive and powerful motherboards. He supports large quantity drivers and can use a mouse. Its interface will be familiar Windows users and other modern operating systems.

Each version has its own interface and sets of options. Even the names of the same parameters may differ. The following article describes several popular BIOS releases.

AMI BIOS

A very common option that can be found on many modern computers. The main menu is divided into 2 parts: a list of categories and various actions, such as exit or save. You will be working on the left side.

You need to go to the section called “ Integrated Peripherals" There is no Russian version of the interface, so all commands are only in English. Use the Down arrow to highlight this item and press Enter.

Here you need to enable ( Enabled) 4 options:

  • USB EHCI controller– main controller. If on motherboard there are ports of version 3.0, this item will be divided into 2 parts: “Controller” and “Controller 2.0”;
  • USB Keyboard Support– keyboard support;
  • USB Mouse Support– mouse support;
  • – work with external data storage: flash drives, disk drives, smartphones and digital cameras.

In some older versions there are only 2 points " USB controller" And " Legacy USB storage support».

When you are done with the settings, press the F10 key to save changes made and restart your computer.

Phoenix AwardBIOS

Another popular version that can often be found on modern laptops. Doesn't have home page, like AMI, but with convenient thematic tabs at the top. You can move between sections using the left and right arrows, and between items using the up and down arrows.

Go to the section " Advanced» using the Right arrow. In it, find the category “ USB configuration" All items in this section must be moved to the position “ Enabled" In some versions the category " USB configuration" may be located in the " tab Peripherals" and not in "Advanced".

To exit the menu, press F10 and confirm exit.

AMI BIOS for Asus

AMI version used on Asus laptops. Externally it is very similar to Phoenix - a similar bookmarks bar. Settings USB are in the section " Advanced" Go there, enable all options and exit using the F10 button.

UEFI

Contrary to popular belief, UEFI is not part of the BIOS. It can rather be called a more advanced, but less popular competitor. There are a large number of different versions, each with their own interfaces. However, here the controls are similar to the usual Windows, so you can easily find the options you need.

Windows Settings

If at the BIOS level all ports and controllers are enabled, but the USB ports still do not work, perhaps the problem is in your settings Windows systems.

First, just try disconnect and reconnect the device. This will check if the drivers are correct. If there's something wrong with them, Windows will try to reinstall them.

If nothing happens when you reconnect, try turn on the controller V Windows registry. To do this you need to do the following:


Video: how to configure any BIOS to boot from a USB flash drive

Instructions

To open the BIOS, press Del after you turn on the computer and before the operating system starts loading. You may need to press a different key to enter the BIOS on your computer. In the lower left corner when checking random access memory there is an inscription Press Del to enter setup. If another key is written instead of Del, press it.

The BIOS window opens. You need to control the BIOS using arrow keys and the Enter and Esc keys. Basic parameters for equipment: Disabled – disable, Enabled – use. Depending on the manufacturer and model, the versions and directory names in the BIOS may differ. The following are the most common names.

In the Advanced menu ( Advanced BIOS features) is prohibited or used USB controller under the USB Functions command (USB Controller/USB Ports/USB Device/Integrated (OnChip) USB Controller). The Enabled/Disabled command turns all USB ports on/off, Both makes all ports available, Primary makes ports on the rear panel only available. 2/4/6/8 USB Ports – number of ports available for operation.

USB 2.0 Controller (High Speed ​​USB/USB 2.0 Supports/USB 2.0 Device). Option to disable or allow the use of USB 2.0. USB 1.1/2.0 Controller item for using all USB controllers, commands: All Disabled - disable everything, All Enabled - enable everything.

USB Speed. An option that changes the operating frequency of the USB bus. Its parameters: 24 MHz and 48 MHz.

Legacy USB Support (USB Device/USB Driver Select/USB Function to DOS/USB Keyboard(Mouse) Support). Section for USB keyboard/mouse support at the BIOS level. Enabled/Disabled command – enables/disables support, Auto – disables standard keyboard/mouse when USB devices are connected and vice versa, OS – provides support by the operating system, BIOS – provides support Motherboard BIOS fees.

Port 64/60 Emulation (USB 1.1 64/60 Emulation) – option for optimizing devices connected to USB port in outdated OS. Enabled/Disabled command – turns it on/off. Emulation Type (UFDDA USB Floppy/ UFDDB USB Floppy/ USB Mass Storage Emulation Type/ USB Mass Storage Device Boot Setting) – when different meanings options The USB drive is emulated in Auto mode - detected automatically, Floppy (FDD Mode or USB Floppy) - as removable media, Forced FDD – like a floppy disk, Hard Disk (HDD Mode or USB HDD) – like HDD, CDROM - as a drive optical disks.

To boot the OS from a USB drive, go to Boot menu(or search First Boot Device in Advanced BIOS features). In the Boot Device Priority section, select 1st Boot Device, then check the box next to the name of your device, or opposite the USB-HDD item.

Sources:

Installing Windows from a flash drive is very convenient. Storing Windows on a flash drive is much more secure than on a disk. Installing from a flash drive will also be faster than from a disk. There are times when the computer does not work or is simply missing optical drive(DVD/CD) ROM. Then installing from a flash drive is a very good way out of the situation. If you need to reinstall Windows on a laptop somewhere on the road, it will be more convenient to do this from a flash drive.

You will need

  • Computer, Windows OS, flash drive, UltraISO program, DAEMON Tools program, Internet access

Instructions

First of all, you need to burn Windows to a flash drive. The capacity must be at least 4 gigabytes. Download the one you need Windows version from . The operating system downloaded from the Internet is in ISO format ( virtual disk). Next, download the UltraISO program. It will be needed in order to make it bootable.

Open Windows image by using UltraISO programs. Go to the Boot menu and select Burn Disc Image. Creation bootable flash drive will destroy all information stored on it. Please take this into account. Insert the flash drive into your computer. The flash drive will appear in the program menu, select it. Select "USB-HDD" as the recording type and click "Record". The recording process will last from 10 to 25 minutes. Upon completion, you will be informed that the process has been successfully completed.

Restart your computer and continuously press the DEL key. This will take you to the BIOS. Select the “BOOT” line, then in the “BOOT DEVISE PRORITY” line select “USB-HDD”. Click on the “Save end Exit” command.

The computer restarts and the process begins Windows installations from a flash drive. If you do not want to install Windows at this moment, simply remove the flash drive from the computer. In order to start the installation process, you just need to insert the USB flash drive into the USB port before turning on the computer.

If you don't want to download Windows from the Internet and it is already on the disk, you need to convert it to ISO format. Download and install the DAEMON Tools program. Insert the disk with DAEMON Tools into the computer drive. In DAEMON Tools, select the File menu, select Create New Image. After the process is completed, you will have Windows in ISO format, which you can write to a flash drive and install Windows from it as described above.

New versions of Windows operating systems include the ability to create backup copy or image. It allows you to quickly bring the system to working condition without resorting to a complete reinstallation.

You will need

  • - DVD disc.

Instructions

To create an image of the Windows Seven operating system, go to the “Control Panel” menu. Now open the System and Security menu and go to the Backup and Restore submenu.

Find the item “Create a system image” and click on it. Wait while the operating system prepares the files for archiving. Specify the location where the future OS image should be stored. To increase data security, it is recommended to use external USB drives. This will allow you to restore the operating state of the system even if the hard drive in use is damaged.

Click "Next" after selecting the device to store the image. A window will open with a list of sections that will be included in the archive. Typically these are the system and boot partitions of the hard drive. Click the "Archive" button. This process takes quite a long time. It is better to leave the computer turned on at night.

Unfortunately, it is not enough to simply create an image. After all, it will need to be launched in the event of a system failure. Repeat the procedure for entering the “Backup and Restore” menu. Click the "Create a system repair disc" button.

Insert a blank DVD into a working drive. Click the "Create Disk" button. Wait until the required files are written. Please note that you can use a regular installation disk as a recovery disk. Windows disk Seven.

If the operating system stops loading, insert the created disk into the drive. Turn on your computer and press the F8 key. Select this DVD drive from the menu that appears. When a menu appears containing options for restoring the operating system, select “Restore the system from an image.”

Now specify the storage location for the archived copies of Windows. Wait until the Windows Seven OS image recovery process completes.

There are several ways to start installing the operating system. Inexperienced users often start it from the desktop. This often leads to the fact that the old OS is not removed, and the new one is simply installed on top of the old one. As a result, the user receives two OS, and installed on one hard section disk. It is much more correct to start loading the OS from the BIOS.

This article is devoted to the question of how to enable USB support in the BIOS. As it turns out, not all users know that the functions of Universal Serial Bus (in the Russian interpretation - “Universal Serial Bus”) can be enabled and configured through BIOS Setup. We will not focus on the circumstances due to which you may need this operation - they may be different. For example, you find that the USB devices on your computer are running slower than they should, and you want to check whether your computer's BIOS supports the latest version of this bus standard.

First, enter BIOS Setup when booting your computer and laptop. A separate article was devoted to how to do this on our website. It is worth noting, however, that the BIOS section with USB functions is not always obvious to the user. In addition, different manufacturers In different BIOS versions, bus management functions can be placed in different sections. This could be the Advanced, Integrated Peripherals, Onboard Devices, etc. sections.

It may, of course, happen that the section for setting up USB functions in the BIOS of your laptop or desktop computer simply no. This situation can most often occur in laptops, in which the number of options available to the user is not very large at all. In the BIOS of my HP netbook, for example, I did not find such an option, no matter how hard I looked. Well, that means it’s not fate...

Setting USB options in BIOS

The number and range of USB features you can adjust in the BIOS can also vary greatly depending on the version. Often in Setup you can install support for a USB mouse and keyboard attached external drives. You can also disable/enable connectivity altogether USB devices or enable support for a specific version, such as USB 2.0.

List of the most common USB options (in different versions BIOS may have different names):

  • USB Function – enable/disable the Universal Serial Bus controller
  • USB 2.0 Controller Mode – switching the USB 2.0 controller to 1.1 mode and back
  • Assign IRQ For USB – assign IRQ to USB devices
  • USB Speed ​​– setting the speed of the USB bus
  • – USB keyboard and mouse support
  • USB Storage Support – support for external drives on this bus
  • Emulation Type – setting USB drive emulation modes

Once you have set the option you need, be sure to save it by selecting the BIOS Setup “Exit and Save Changes” option to restart your computer.

When setting USB parameters in the BIOS, however, you should remember that they incorrect installation may cause any devices permanently connected to the Universal Serial Bus, such as a keyboard or mouse, to become inoperable.

Conclusion

In this article, you learned how to enable USB support, as well as set USB options in the BIOS of your computer or laptop. As a rule, this operation is quite simple and will not take you much time.

Hi all! Today we will look at several questions on the topic of how to connect USB to a computer. First, we will learn how to connect any devices to a PC or laptop. And secondly, I’ll tell you how you can connect additional USB ports to your computer if you don’t have enough of them for all your devices. So, let's go!

How to connect a USB cable to a computer?

A USB port is by far the most common type of connecting devices to a computer or laptop. There are three types of connectors: 1.0, 2.0 and 3.0. If the first one can now be found only on the oldest computers, then the second and third ones are used today. At their core, they differ in data transfer speed. And according to appearance, what is more important for us now is color. USB 2.0 has a black connector and plug, USB 3.0 has a blue color. You can read more about the specifications and differences between standards.

Before connecting the USB cable to the computer, look at the plug of your gadget - if the blue connector is connected to the black port, the device will not use all its speed characteristics to the maximum. If you plug the black plug into the blue one, then absolutely nothing will happen - the USB 3.0 port will simply operate at the speed that is maximum for 2.0.


So let's look at back panel of your computer, find a USB port of the same color as the plug and connect it.

After this, the device will either be detected by itself in the system, if it is a keyboard, mouse, webcam, or some other simple and common device for which Windows already has a driver. Or to work you will need to install the software that comes with the device on CD.

How to connect additional USB ports to a computer?

Any modern motherboard already has built-in USB ports - both 2.0 and 3.0. However, we usually connect so many different peripherals that there may simply not be enough of them, for example, to connect a flash drive or external drive and upload fresh photos to it.

Connecting a USB stick to the rear panel

What to do? There are two ways. The first, preferable one, is to buy a separate bracket with USB ports and insert it into the additional slots available on the back panel of the case - the same ones where we attach video or sound card, wireless adapter, and other components connected directly to the board. It looks like this:

In order to accomplish this task, the motherboard must support the connection of additional USB ports. This can be determined by the presence of connectors on the motherboard labeled USB or USB 3.


Connectors for USB 3.0 are large, have many contacts and are designed to connect two ports at once in one plug.



USB 2.0 is smaller and each of them can be connected to 2 ports separately.


Accordingly, we look at the presence of such connectors on the motherboard, buy the corresponding brackets, fix them in the back of the case and connect them to our connectors.

Connecting a unit with USB ports instead of a flop

Another variation of this method of increasing the number of ports is special block with USB, which is inserted into the front of the case instead of the old floppy disk - 3.5 floppy


There are many options for designing such a block. For example, combined for USB connections 2.0 and 3.0

And in following example USB 2.0 ports combined with microphone and headphone jacks

Connecting such a block occurs in exactly the same way as the bracket described above - to the corresponding connectors on the motherboard.

External USB hub

Finally, another option for increasing the number of ports is to buy an external USB hub. However, there are a number of disadvantages, because of which I would not connect any serious equipment through it, but would only use it for flash drives or, as a last resort, a mouse.

Since this is a hub, all the load from its several ports goes to one single computer to which it is connected. Due to this overload, certain devices may periodically fall off, which is not good. If you connect to USB hub hard drive, the electricity supplied through it may not be enough to operate it. Therefore, we reserve this method only for light fast food - flash drives.