Can't see the second hdmi monitor. Solution: The computer does not see the second monitor

Before you start solving problems, you need to make sure that the latest driver is installed on the video card of your computer/laptop. For this it is necessary determine which video card you have , go to the manufacturer’s website and see what version of the driver for your video card is current and if you need to update it.

After connecting the TV to the computer, the desktop image is displayed on the TV (i.e. the TV has become the main screen, and the computer screen acts as a secondary screen).

The goal is to make the computer screen the main one and the TV screen an additional one.

Solution: Right-click on the desktop and select " Screen resolution"or come in "Control Panel" - "Display" - "Setting Screen Resolution".

The next step is to determine which screen we have as the main (1st) and additional (2nd) screen, to do this you need to press " Define"You will see a number on the TV screen" 1 ", number on the computer/laptop screen " 2 ". To correct the situation, in the Screen Resolution window, click on the screen " 2 ". tick " Make it the main monitor" and press the button " OK".

How to change the audio source when connecting a TV using HDMI/DVI?

Those. you have everything connected and everything works for you, but the sound needs to be switched from the computer to the TV or vice versa. To do this, on your computer, right-click on the speaker icon on the taskbar. if you do not have such an icon, restore it and select " Playback device".

In the devices window that opens, select the playback device and click the " Default" And " OK".

After connecting the computer/laptop to the TV using an hdmi/dvi/vga cable, the TV shows an image of an empty desktop without shortcuts, windows, etc.

A similar situation is associated with the settings on the computer; in this case, the TV works as a screen extension, i.e. it increases the size of your desktop, if you drag any window to the right or left on your computer/laptop using the mouse cursor (depending on the settings), then part of this window will be displayed on the TV.

If you are not satisfied with this setting and you want the TV to completely duplicate everything that happens on the computer/laptop monitor, then right-click on the desktop and select " Screen resolution".

In the properties window that opens, in the field Multiple screens select " Duplicate these screens", click " Apply".

If you are satisfied with everything, in the confirmation window, click " Save changes", if not, then you don’t need to press anything; after 15 seconds of setting, go back.

When connecting a TV using an HDMI/DVI cable, the computer “sees” the TV, but there is no image on the TV (HDMI mode is selected on the TV).

Solution - the problem is most likely related to a low-quality HDMI/DVI cable and it needs to be changed.

The PC “does not see” the second monitor: check the cable

If the computer does not detect the second monitor after connecting, first check whether the cable with which you are trying to connect the monitor to your system unit is working. Connect your monitor to your computer using a different cable if you have multiple monitor cables.

If the screen worked, then most likely the problem was a malfunction of the second wire, which can be safely disposed of.

If, on the other hand, the screen still does not work, the problem may be with your PC's video output or incorrect system settings. The PC “does not see” the second monitor: check the video output

If your second monitor has different interfaces, check whether it can be connected, for example, via HDMI instead of a VGA connector. Alternatively, you can try using other available interfaces on your computer, or try connecting via a VGA-HDMI or DVI-HDMI adapter. The last option is relevant if the monitor does not have an HDMI connector, but the PC does. As a rule, computers are equipped with several video outputs: the most common are VGA, DVI and HDMI. Try all of them using the appropriate cable types.

Attention: you can often find several outputs of the same type on a computer. If you connected your second screen, for example, to the VGA output, check if there is another one that is equally free. Try moving the cable to an alternative output and check if the monitor is recognized.

If even after these manipulations you do not see the picture on the monitor, perhaps the problem lies in connecting the cable to the integrated graphics card, which is deactivated by default, since the image from the dedicated card is displayed on the monitor. In the photo you see just such a case: the right connectors belong to the graphics card (highlighted in red), while the left ones belong to the motherboard. Since the integrated video system is deactivated by default in this situation, you can only receive images from the outputs offered by the dedicated graphics card. The PC “does not see” the second monitor: enable detection of the second monitor in the system settings

Another reason for the second monitor not being recognized may be incorrect system settings on your computer. In this case, follow the instructions below to combine the second monitor with your computer: Go to Control Panel, select the option All Control Panel Items | Screen | Screen Resolution" and click the "Define" button

In some cases, after connecting the TV to a computer or laptop via an HDMI cable, the image simply does not appear on the TV. It’s rare, but it also happens that there is sound via HDMI, but there is no image on the TV. Although, it seems to me that most often they encounter the opposite problem, when .

In this article, we will try to deal exclusively with the problem of image output via an HDMI cable. It seems that everything is simple, we connect the TV to the computer, select the desired input on the TV, and if necessary, then on the computer we also select the required picture output mode. And according to the idea, everything should already be working. But instead we see the message “No signal” on the TV.

Before we jump into any tips, check out the instructions for connecting your TV to your computer via HDMI:

And another one . Using the example of a Philips TV and Windows 10.

If you do everything according to the instructions, but there is no result, and the image still does not appear on the TV, then now we will figure it out.

There is no signal on the TV via HDMI and there is no image

1 The first thing you need to do is check cable connection, and remember the HDMI input number on the TV to which the cable is connected. Check if the cable is properly inserted into the output on your laptop or desktop computer. Then, check the cable connection on your TV, and be sure to look at which HDMI input you connected the cable to. They are signed. It looks like this:

For example, I connected the cable to HDMI input number 3. The fact is that the TV most likely has several inputs. And in the settings we will need to select the one to which we connected the cable.

2 Check the settings on the TV. Select the appropriate HDMI input in the settings. Not always, after connecting the cable, the image from the computer immediately appears on the TV. Most likely, you will see the message “No signal” or “Cable not connected”. There should be a button on your TV remote control that opens a menu with a choice of signal source. On Philips TVs, for example, this button is labeled as SOURCES. Click on it and select the HDMI input with the desired number from the list.

On LG TVs, this is a button INPUT. Click on it and select the required source. On new LG TVs on Web OS, they may have already done it differently. But, the scheme is always the same, on any TV (Samsung, SONY, LG): open the menu with the selection of the signal source, and select the HDMI input with the desired number (to which the cable is connected).

3 Check the settings on the computer. Your computer may not be able to output images to the projector. (TV, monitor), so the picture does not appear on the TV and there is no signal. It's very easy to check. In Windows 10, Windows 8 and Windows 10, just press the keyboard shortcut Win+P, and select one of three image output options: Duplicate, Extend, Projector only.

If you select "Disable projector", then the image via HDMI will not be output. In Windows 10, everything is approximately the same, only there a menu appears on the side of the screen.

4 If you still haven’t managed to pair your computer with your TV, then it would be good to find out what the reason is: the TV, the computer, or the cable. It's not difficult to do this. Especially if you have another PC, TV, monitor with an HDMI input, or another cable.

Try connecting your laptop to another TV or monitor, for example. If everything works, then the problem is in your TV (which is unlikely). This will eliminate problems with the cable. You can also just take another laptop (even borrow from a neighbor) and connect it to a TV that does not display an image. If everything works, then the problem is in your laptop (computer). Which is what happens most often.

5 One more piece of advice. Try updating the video card driver with a TV connected via HDMI. Just download the driver from the laptop/video card manufacturer's website and install it.

6 Update: in the comments Andrey shared one interesting solution. After connecting the TV to the laptop, the TV showed a “No signal” error. But the laptop saw two monitors (built-in and TV). Changing the frequency for the second screen (TV) helped. I decided to add this solution to the article and show in more detail how to do it.

Windows 10

Open the screen settings and see that there are two displays.

Scroll down the settings page and open “Advanced display settings”.

Let's look carefully. There will be "Display 1" and "Display 2". Near one of the bottom may be the name of your TV. I currently have one display not active, since the image is only displayed on the second display. Press "Display video adapter properties...". You need to open the TV properties.

In the new window, on the “Monitor” tab, in the “Screen refresh rate” menu, set it to 60 Hz. Click "Apply".

After this, the “No Signal” error on the TV should disappear. An image from a computer connected via HDMI will appear. For some reason Andrey’s system set the TV frequency to 25 Hz.

Windows 7

Right-click on an empty area of the desktop and open “Screen Resolution”. TV must be selected in the Screen menu. Let me remind you that this method can only be used when Windows sees the TV connected via HDMI, but does not display an image.

Go to "Advanced Settings" and on the "Monitor" tab, select 60 Hz. Apply the settings.

If this method worked, write about it in the comments.

7 Update: turn off everything unnecessary from the TV. For example, AV cable (tulip). Another device that can also be connected via HDMI. There is information in the comments that disconnecting the hard drive from the USB port helped! 8 Update: if you have an LG TV (maybe this applies to other TVs as well), then disable the "Quick Start" and the "SIMPLINK" function in the settings.

There are reviews that this helped.

What should I do if my computer does not output images via HDMI to my TV?

When we have determined that the problem is in the computer or laptop.

Our video card displays the image, and we actually connect to it. So that might be the problem. Yes, maybe something burned there, etc. But, as a rule, the problem is of a software nature. Something is wrong with the video card driver, or with the settings, so the image does not come through HDMI.

Therefore, first of all, I advise you to update the video adapter driver. If you have a laptop, then go to the manufacturer’s official website, find your model through the search, select the operating system you have installed, and download the VGA driver. Then, run its installation.

If your laptop has two video adapters, update the drivers for both. Maybe, for example, nVidia Graphics Driver, and Intel Graphics Driver, like on my ASUS laptop.

And if you have a desktop computer, then download the driver from the video card manufacturer’s website. You can see which video card is installed in the device manager, or in the characteristics of the system unit.

If you somehow managed to solve the problem with displaying an image on a TV using an HDMI cable, then share your advice in the comments. I will be grateful.

If the computer does not detect the second monitor after connecting, first check whether the cable with which you are trying to connect the monitor to your system unit is working properly.

Connect your monitor to your computer using a different cable if you have multiple monitor cables.
If the screen worked, then most likely the problem was a malfunction of the second wire, which can be safely disposed of.
If, on the other hand, the screen still does not work, the problem may be with your PC's video output or incorrect system settings.

The PC “does not see” the second monitor: check the video output

As a rule, computers are equipped with several video outputs: the most common are VGA, DVI and HDMI. Try all of them using the appropriate cable types.
Attention: you can often find several outputs of the same type on a computer. If you connected your second screen, for example, to the VGA output, check if there is another one that is equally free. Try moving the cable to an alternative output and check if the monitor is recognized.
If even after these manipulations you do not see the picture on the monitor, perhaps the problem lies in connecting the cable to the integrated graphics card, which is deactivated by default, since the image from the dedicated card is displayed on the monitor.

In the photo you see just such a case: the right connectors belong to the graphics card (highlighted in red), while the left ones belong to the motherboard. Since the integrated video system is deactivated by default in this situation, you can only receive images from the outputs offered by the dedicated graphics card.

The PC “does not see” the second monitor: enable detection of the second monitor in the system settings

Another reason for the second monitor not being recognized may be incorrect system settings on your computer. In this case, follow the steps below to pair the second monitor with your computer:

Go to “Control Panel”, select the option “All Control Panel Items | Screen | Screen Resolution" and click the "Define" button
Click on the found monitor and select the “Extend these screens” menu item.
If you are establishing a connection to a wireless display, click on the “Detect” button and wait until the connection with the monitor is established.

Just a few years ago, a second monitor for a computer was considered something strange and special. Today, computer installations with two or more monitors are widely used in various fields of activity. Programmers, architects, designers, employees of financial institutions, and even ordinary users prefer two monitors for convenient organization of their workspace.

But what if you decide to buy another monitor to accommodate 30+ social media tabs, and it is not detected by the computer? This happens sometimes, and we have several ways to solve this problem.

Why doesn't Windows see the second monitor?

In this article you will learn what to do if The computer does not see the second monitor. We will only touch on the Windows platform, and wish users good luck in finding a solution to the problem :)

Port

The first step is to determine whether everything is ok with the connection and whether an additional monitor is connected to the right port. If you have a discrete graphics card, all graphics output ports are located on it. This means that any monitor cables (VGA, DVI..) you connect to the motherboard will not work. Make sure that the cable is connected to the graphics adapter port.

If you want to use the motherboard and video card ports at the same time (for example, if the video card does not have VGA, but you need to connect VGA and HDMI), you need to go into the BIOS and set the integrated adapter as primary. Video adapter drivers must provide simultaneous support for the motherboard and graphics card ports.

Force search for additional monitors in Windows

Most displays are automatically detected by Windows when connected, and Win + P allows you to control them. However, there are times when Windows doesn't see second monitor. This may be due to an outdated secondary display model, or problems with /. (Don't forget to clean the system from time to time using)

To have Windows detect your second monitor, right-click on your desktop, click Display Settings, then the Detect button under Multiple Displays.

Reinstalling or rolling back the graphics card driver

If the problem appears after the next driver update, you need to roll back to an older version.

Go to Device Manager and find your video card in the “Video Adapters” section. Then right-click on it, go to Properties, and open the “Driver” tab. Click “Roll Back” and follow the instructions. After restarting your computer, your second monitor should work. You can also update the driver to the latest version. To work with drivers, we recommend using .

You can also follow the above steps for an additional monitor (in the “Monitors” section of Device Manager)

Bottom line

We have given several ways to solve the problem with the add-on not working. display. If your the computer still does not see the second monitor, it is worth checking the functionality of the latter. Connect it instead of the main screen and make sure it works as it should. Good luck.