The smartphone does not connect to the PC via USB. Troubleshooting problems connecting a smartphone to a computer via USB. Use the included USB cable

There are cases when you connect your phone to a personal computer or laptop via USB cable, the first one does not recognize it. It becomes impossible to reload files from your phone to your computer and vice versa. It's a shame.

However, there are ways to recognize the cause of this type of incident and ways to correct it. If your phone is not just a mobile phone, but a gadget with an operating system, then reloading files via USB is impossible in the usual way, i.e. The phone is no longer like an ordinary flash drive - it is a computer itself. In order to transfer files from your phone, you will have to either reflash it or send files by mail.

I recently encountered a similar problem on Samsung phone Galaxy: as long as the gadget was not configured in computer mode, reading files and downloading them to the PC via USB connection was impossible, after “perestroika” it became impossible.

However, there are cases when the phone works in normal mode and acts as a flash drive, but the PC still “does not see” it. Why? What can you do in this case to try to fix the problem. Read below.

Music, movies, photos, applications - all this is simply necessary to modern man on his phone. Without communication with a PC, the mobile phone will sharply lose its functionality. Close interaction is ensured through a connection via a USB cable or via Bluetooth. Since file transfer via Bluetooth is quite slow, the USB connection is the most common.

But the user, having decided to use data transfer via a USB connection, suddenly cannot do this. Understanding his disappointment, let's give him some advice. To do this, consider two options: when the computer does not respond to the mobile connection at all, and also if the phone is detected as an unknown device. So, now in more detail.

How to detect a problem

When you connect to the computer, your phone is not detected in any way, nothing lights up on it, and there is no message on the monitor about connecting the device. This is a fairly common malfunction, with several causes. Let's try to list them and give recommendations for eliminating this problem. It is assumed that USB port, which you are connecting to is healthy. That is, other devices work normally through it.

1. If before the phone connects normally, and then suddenly doesn’t want to, then you should, first of all, suspect the quality of its connection to the computer. Try taking it out connection cable from the mobile and from the USB input and then reconnect them. It often happens that the contacts of the telephone connector simply become loose or dirty. This problem is more common Sony brand Ericsson, whose models stand out in the market mobile communications a completely illiterate and often faulty connector.

Tip: if possible, try to clean the telephone connector with an eraser, after which remove any remaining rubber from the surface of the contacts.

If cleaning does not help, then connect the phone via another USB cable. Take it from friends or relatives. Cable failure is not the most common cause of trouble, but this option also needs to be taken into account. If it helps, then you just need to buy a new accessory.

2. Restart your computer. Oddly enough, this method helps in most cases without any additional measures. During the reboot process, system settings are reset and redefined USB ports. By the way, when the computer does not see the tablet, the best way to help is to restart the computer, as is the case with the phone.

3. Rebooting your PC didn't help? Then, to be on the safe side, restart your mobile phone. Unplug it, remove the battery for 10 minutes, and then put it back in. Turn on the device. Nothing happens? Go ahead.

4. Disconnect the cable from one USB and connect it to another USB input. This simple action often helps, since the computer sometimes confuses the ports. To make sure the OS sees the connection, you can use in the following way. Go to Device Manager and find a list of used ports there. Typically this information includes all USB bus controllers. Open the list. In it you can see all the working ports of the computer. Find in this list the port to which the phone is connected in this moment(this can be seen in the “Nutrition” column). All other ports, except the one found, can be temporarily disabled. The computer will have no choice but to see your mobile.

There is, of course, the possibility of a breakdown of the phone itself or its connector. This is the most difficult option, in which, without contacting service center not enough. There they will be able to tell you exactly why the computer does not see the phone and how to fix it.

USB device not recognized

We go further, considering the second case, in which the computer detects the phone as unidentified device. Of course, work with unknown device The OS doesn't want to. And the question is not that Windows itself is imperfect, because the same problems often arise with Linux and other operating systems. Therefore, we must help the computer identify our mobile phone. Let us list the reasons for this phenomenon and possible actions user:

The problem may be with the phone itself. Connect the device to another computer. If the problem persists, then the reason lies inside the mobile device. You may need to enable one of the computer connection modes in the settings. For example, the “Data transfer” or “Storage” mode. Experiment with these modes;

Tip: Check your phone settings. In some mobile models, you must manually enable synchronization mode, which is disabled by default. Or disable standing block. If there is a blocking, open access must be established.

a) restart your PC and phone as described in section 1;

b) often the mobile phone is not recognized by the OS in case of lack of power supply. If you connect the phone to the front computer panel, then try connecting it directly to the motherboard, into the USB slot located on the back of the system unit;

Tip: In the Device Manager section, find the port you are using and open the Power Options tab. Check to see if the “Allow device to turn off to save power” checkbox is unchecked. If the checkbox is checked, remove it.

Sometimes crashes occur in the OS, as a result of which the “native” drivers of some devices are lost. Reinstalling the drivers for the motherboard and for connected devices. If your phone came with a driver disk, use it to connect the device;

Tip: You can check whether your device needs drivers in Device Manager. If there is a yellow question mark before the device name, you can conclude that there are no drivers for this plug-in. How can you determine that an unidentified device is a mobile phone? Very simple. Disconnect it from your computer and the question mark will disappear.

We also cannot exclude the possibility of the OS being infected by a virus that sets its own rules on the computer. Check all drives (including system) good antivirus with current databases.

If none of the above helped you, and there is still no connection between your mobile phone and your computer, then you can use a radical treatment. If the phone is detected perfectly on another PC, then the cause of the problem most likely lies in the operating system. You'll have to reinstall the system. Then everything will surely work. Moreover, such errors in the system accumulate gradually, it is impossible not to notice. Thus, reinstalling the software will not only solve the issue of connecting the phone, but will also eliminate other possible errors.

Modern Cell phones according to their capabilities, they combine a media player, telephone, organizer, flash drive, navigator and a lot of others useful devices. Of course, users constantly communicate between mobile device and the computer, moving a bunch of information in both directions.

Music, movies, photos, applications - all this is simply necessary for a modern person in his phone. Without communication with a PC, the mobile phone will sharply lose its functionality. Close interaction is ensured through a connection via a USB cable or via Bluetooth. Since file transfer via Bluetooth is quite slow, the USB connection is the most common.

Now imagine the bewilderment and even anger of the user if nothing happens when you connect the phone to a personal computer. The operating system stubbornly refuses to see mobile device, suggesting a lack of proper connection. In this article we will try to find out the reasons similar phenomenon and answer the common question: “Why doesn’t the computer see the phone?” We will consider two options: when the computer does not respond to the mobile connection at all, and also if the phone is detected as an unknown device. So, now in more detail.

How to detect a problem

When you connect to the computer, your phone is not detected in any way, nothing lights up on it, and there is no message on the monitor about connecting the device. This is a fairly common malfunction, with several causes. Let's try to list them and give recommendations for eliminating this problem. This assumes that the USB port you are connecting to is working. That is, other devices work normally through it.

1. If the phone used to connect normally, but then suddenly it didn’t want to, then you should first of all suspect the quality of its connection to the computer. Try removing the connection cable from both the mobile and the USB input and then reconnecting them. It often happens that the contacts of the telephone connector simply become loose or dirty. This problem is inherent to a greater extent in the brand. Sony Ericsson, the models of which stand out in the mobile communications market with a completely illiterate and often faulty connector.

Tip: if possible, try to clean the telephone connector with an eraser, after which remove any remaining rubber from the surface of the contacts.

2. Restart your computer. Oddly enough, this method helps in most cases without any additional measures. The reboot process resets the system settings and redefines the USB ports. By the way, when the computer does not see the tablet, the best way to help is to restart the computer, as is the case with the phone.

3. Rebooting your PC didn't help? Then, to be safe, restart your mobile phone. Unplug it, remove the battery for 10 minutes, and then put it back in. Turn on the device. Nothing happens? Go ahead.

4. Disconnect the cable from one USB and connect it to another USB input. This simple action often helps, since the computer sometimes confuses the ports. To ensure that the OS sees the connection, you can use the following method. Go to "Device Manager" and find a list of used ports there. Typically this information includes all USB bus controllers. Open the list. In it you can see all the working ports of the computer. Find in this list the port to which the phone is currently connected (this can be seen in the “Power” column). All other ports, except the one found, can be temporarily disabled. The computer will have no choice but to see your mobile.

There is, of course, the possibility of a breakdown of the phone itself or its connector. This is the most difficult option, in which you cannot do without contacting a service center. There they will be able to tell you exactly why the computer does not see the phone and how to fix it.

USB device not recognized

We go further, considering the second case, in which the computer identifies the phone as an unidentified device. Of course, the OS does not want to work with an unknown device. And the question is not that Windows itself is imperfect, because the same problems often arise with Linux and other operating systems. Therefore, we must help the computer identify our mobile phone. We list the reasons for this phenomenon and possible user actions:

Tip: Check your phone settings. In some mobile models, you must manually enable synchronization mode, which is disabled by default. Or disable the current blocking. If there is a blocking, open access must be established.

a) restart your PC and phone as described in section 1;

Tip: Under Device Manager, find the port you are using and open the Power Management tab. Check to see if the “Allow device to turn off to save power” checkbox is unchecked. If the checkbox is checked, remove it.

Sometimes failures occur in the OS, as a result of which the “native” drivers of some devices are lost. Reinstalling drivers for the motherboard and connected devices helps solve the problem. If your phone came with a driver disk, use it to connect the device;

We also cannot exclude the possibility of the OS being infected by a virus that sets its own rules on the computer. Check all drives (including the system drive) with a good antivirus with up-to-date databases.

Owners of phones and tablets running Android OS regularly complain about problems with the USB connection - very often the computer refuses to see the device or the gadget does not charge from the PC. The causes of problems can be different, so you first need to conduct a thorough diagnosis and identify the source of the problem.

Why the PC does not recognize an Android phone or tablet via USB: reasons and solutions

In order to conduct a successful diagnosis, you must first answer several questions:

Has this always been a problem or has the device recently stopped being detected by the computer via USB?
Did the problem occur after any manipulations with your smartphone, tablet, or PC (laptop)?

Answering these questions can help you fix the problem faster.

There are several typical cases that occur when connecting via a USB cable.

For example, if you have a new device and the operating system is installed on your computer Windows system XP, then you need to update the OS to current version or download the MTP protocol (Media Transfer Protocol). After installing it and restarting the PC, the gadget should be recognized.

Users of Windows 7, 8.1, 10 must first make sure that the device is connected to the PC. A corresponding notification appears, informing you about the connected storage device. Sometimes the gadget is recognized as a Camera (PTP) - in this case, just click on the message and you will switch to MTP mode.

Switch Camera mode to MTP for data transfer

But these are not all the problems that a user may encounter.

The computer does not recognize the device, but it is charging

If this problem occurs, you need to make sure that the gadget is detected by the computer. If device connection messages do not appear, do the following:

Smartphones with new versions of Android are recognized in charging mode by default. Therefore, you need to click on the “Charging via USB” notification and select “File Transfer”.

What to do if your mobile device is not detected by your PC: video

The device is not recognized, does not charge and does not turn on

In this case, follow all the steps from the previous section. If there is no result, remove the battery from the device. The battery fails after long-term use- often its removal helps solve the problem. Inspect the battery for damage or irregularities. If there is deformation, the part must be replaced.

The reason may also lie in the software. Try to fix the error like this:

Disable programs and services while charging.
Install a utility to optimize the device, for example, Clean Master, Smart Manager. They remove excess and unnecessary information on the gadget, reduce the load on the system.
Roll back the OS to the starting version.
Reflash the device. Perhaps to incorrect operation The device was caused by unprofessional firmware.

The computer does not see the internal memory of the device

If, when connecting a gadget via USB, the PC sees only an external card, take the following measures:

With such a reset, you will lose all data that was stored in internal memory, so it’s better to save the information on a flash card first.

The computer does not see only the photo

If pictures and images are not recognized when connecting to a PC, do the following:

Make sure that the device is in MTP mode for data transfer - only in this case will you see information from external card memory, and from internal.
View the contents of folders using file manager, for example, TotalCommander. If photos are not displayed in this utility, it means that they were deleted or the system was damaged.

The device does not want to connect: how to avoid this problem

If you want to protect yourself from difficulties in operating your Android device, just follow simple rules.

Be careful with the USB cable. Do not bend it to avoid damage.
Do not drop the device, avoid getting liquid into the connectors.
Trust the firmware of your device to professionals, use proven firmware and patches.
Install software downloaded from official sources.
Clear your gadget's memory regularly, use special programs and utilities.

If you have tried all the described methods to diagnose the problem, but none of them brought results, entrust the problem to professionals. This way you can save your time and avoid causing even more damage to the device.

Some files and applications on a smartphone or tablet on Android based much easier to manage through Personal Computer. For example, programs are too big size can take a very long time to download directly to your phone or copy or transfer directly to your device. More advanced functions, such as flashing the device’s firmware, can also be implemented through a connection to a computer. After all, having a USB cable and a PC at hand, you can charge your phone - at work, for example. However, when connecting an Android-based device to a computer, problems sometimes arise: the PC does not see the gadget, does not charge or does not display any specific files. How to deal with such problems?

Why doesn't the computer recognize the Android device?

When connecting an Android gadget via USB, something can go wrong, and you end up with a phone and cable that are completely useless when connected to a computer. In other words, we get a problem with controlling the device via a PC or a lack of recognition of the gadget at all. In most cases, this situation is completely correctable, and by using only own strength. Therefore, in order to solve such a problem, you must first figure out what exactly the problem is and act by correcting it.

So why can't a computer or laptop see an Android tablet via USB? There are several variations for the connection problem. The inconsistency can be expressed in the computer completely ignoring the device, in a problem with displaying the internal or external memory phone or only charging, but not using the phone as a USB drive. Much easier to consider possible types problems separately from each other.

The phone charges when connected via USB, but the PC does not see it

The problem may be, for example, in the USB cable - this can be solved or checked by replacing the cord. Another option for localizing the problem is a broken USB port; this error goes away by connecting to another port. You can also try connecting your phone to another computer, if possible. If the problem does not go away, unfortunately, you won’t be able to solve it yourself. E sl and several computers do not recognize the device as a USB drive and only charge it, it is better to contact a specialist, since a malfunction with such symptoms can be eliminated by repair.

It’s worth starting with something else: check the settings for connecting your phone to your computer. If you select the “charge only” or “USB modem” options, it will be impossible to see files on the phone - to do this, you need to connect the phone as a storage device, as a camera (if you need photos) or in media data transfer mode. Another point important for devices with installed graphic key: To open access to files, you need to unlock the phone connected to the computer.

The problem may be related to the drivers. Two possible options:

via Device Manager, update the driver for the device: either automatically search for the update on the Internet, or run a search for it on your computer;
remove the existing driver, download a new one and install.

For owners of computers on Windows XP: unlike the seventh, eighth and tenth versions operating system XP may require an additional protocol to work with Android devices. The Media Transfer Protocol, or MTP, can correct the situation. You can find a link to download it on the Internet in the public domain.

The gadget is not recognized and is not charging

The first thing to check is the cable and its connector. Something may be wrong with either the first (a hall, a rupture, the contacts coming off), or the second (the presence of dirt or dust on the connections, again the contacts coming out). The first is “treated” by replacing the cable, the second by carefully cleaning the connector with a brush (optionally with a toothpick with a piece of cotton wool wrapped around it), but if the connector is poorly secured, by repairing it at a service center. You can charge the battery for a while using a special adapter separately from the phone, but it will still be more convenient to repair it.

Owners of Android devices are lucky: damaged USB cable can be easily replaced with a new one. And here iPhone owners such a purchase will cost a pretty penny

In addition to mechanical reasons, a malfunction can be caused by software problems. To avoid this, you should regularly use a program to clean your device from unnecessary processes And residual files: in more latest versions Android has it initially, for older ones there are many free applications. If the problem has already appeared, you can try two options:

flash the device,
do hard reset - full reset everyone custom settings to factory ones.

The firmware must be carried out consciously; if the algorithm is incorrect, you can easily make a “brick” out of a smartphone.

The computer sees the flash drive, but does not connect to the internal memory

The most common option that causes such a failure to occur may be selecting the wrong item when connecting the device itself to the computer. By default, Android devices are usually connected in charging mode, sometimes as USB storage, which only gives access to a flash drive. To access the memory of the device itself, just switch to connection mode to transfer media data: you may need to disconnect the phone and connect again.

If you have previously performed similar actions, you should reconnect the device and select the correct item

If it doesn't help, you can try radical method and perform a hard reset of the entire system, which consists of complete cleaning devices from user settings and reset back to factory. This can be done through the settings, the “Personal data” block, the “ Backup and reset."

If it doesn't work and full reset, it is better to contact a specialist, since the malfunction may be related to software or firmware.

Files are not located on the tablet or phone (photos, videos, etc.)

It’s worth starting with those described in previous paragraphs measures: check the serviceability of the cable, input and Special attention pay attention to the mode of connecting the phone to the computer. To freely manage files, you need a media data transfer mode, also known as MTP; for photographs, the option of connecting your phone as a camera may be suitable. Using a smartphone as a USB drive or connecting it only for charging are the most common cases that lead to recognition problems and difficulties when working with files via a PC.

What to do to make sure everything connects correctly

The key to a successful tandem of a computer and a phone or tablet lies in the attentiveness of the owner. Make sure that the cable and its inputs are in good working order and especially connect the phone via desired mode in accordance with the task - it sounds easy, right? At worst, you can use the classic “disable and re-enable” approaches, or at most try resetting the phone data. In more serious cases, it is better to entrust the decision to a professional.

How to solve a problem connecting a tablet or smartphone to a computer: video

If you look into possible reasons problems with such a connection, it becomes clear that most of them are not as complex and unsolvable as it might seem at first glance. Nevertheless independent work It's better not to get carried away. If the problem is beyond your competence, contact a specialist so as not to complicate everything yourself.

What to do if the laptop does not see the phone via USB? The reason may be several known factors that have very specific solutions.

Problems with the USB cable

Quite often, you cannot connect your device to your laptop due to a broken cable. Perhaps you did not use it very carefully, or your pets “helped” give it the proper condition. Take another known working wire from a friend, and then try to repeat the procedure. If the phone is detected, the problem is solved. You'll have to go to the store and buy new USB cable, fortunately it is quite cheap.

Glitch in port operation

An old admin saying goes: “reboot the system to make it work.” The option remains relevant to this day for everyone who owns laptops with pre-installed Windows on board. Sometimes USB ports simply glitch, and after a reboot everything goes back to normal.

Another one interesting feature– change of port. If the connection could not be achieved by inserting a cable into one port, it will certainly be possible when connecting to another. In extreme cases, you will need to reinstall the native USB drivers , which come with the motherboard.

Alternatively use the path:

"Start";
"Control Panel";
"System";
"Device Manager".

If you see a problematic port marked with a question mark or a red cross, update it if possible.

The reason lies in the phone itself

So, you are sure that everything is fine with your laptop. Then the reason may lie in the connected device itself. This could be either disabled synchronization, or glitches in the firmware, or something else. The easiest way is to restart your phone and repeat your attempts.

In more advanced cases, you need to remove the battery and wait 4 minutes. In the worst case scenario, you will need to reflash the device.

Alternatively you can download special software for working the phone with a PC, like Nokia PC Suite, SE PC Companion, etc.

Virus

Trivial Trojan and malware can easily block USB operation ports, depriving the PC of the ability to connect external electronic devices. Similar problems This can often be observed with ordinary flash drives, with which we walk around the institute from computer to computer in an attempt to find some useful report.

Use the services, just first update its database to the current state, if possible. Otherwise, no one can guarantee that you will thoroughly check and eliminate dangerous contents.

The most reliable option

Unfortunately, the repair service by a professional is paid and can range from several hundred to thousands of rubles, since the breakdown can be very different: from a bug in the firmware to a burnt-out USB hub.