In the modern variety of various technologies and methods for transmitting information, the standardization of image encoding is very important. Universal connectors on a variety of devices allow you to connect a wide variety of devices without losing their functionality. This universal connector is HDMI. It replaced the already outdated VGA (although it remains extremely popular).
HDMI and its features
The advantages of HDMI over its competitors are obvious. This and high transmission speed 
image, and the absence of information loss during image transfer or conversion. As well as the ability to separately transmit audio information. This compares it favorably with VGA or other ports, which do not allow for the transmission of both image and sound on one channel.
REFERENCE! HDMI (High Definition Multimedia Interface) is a universal interface. It can be found on any device to display pictures, whether it is a computer monitor, TV or projector.
This format allows for data transfer rates up to 48 Gb / s. This speed makes it possible to play UHD-format pictures without loss of information and playback delays.
The structure of the connector consists of 19 contacts and is divided into three formats:
- HDMI - Type A;
- Mini-HDMI - Type C;
- Micro-HDMI - Type D.
They differ in the size and shape of the port.
Sometimes an HDMI connection does not produce the expected result: the screen goes blank or turns on. Let's see why this is happening.
Problems with the screen when connecting HDMI
There are several main reasons why you are having trouble connecting an HDMI cable.
Monitor defective
There may be a malfunction in the device itself. The monitor may have a broken connector or 
one of the contacts will be damaged. The malfunction can also consist in a rupture of the loop or a malfunction of the matrix.
In this case the best solution to resolve the problem would be contacting a service center. To exclude this option, try to connect the monitor to another pc.
Attention! If the monitor or TV is under warranty, you should not try to open the panel and engage in self-repair.
These actions will result in the device no longer being serviced under warranty.
Defective cable
Maybe, the presence of fiber breaks or a violation of the integrity of the connector does not allow the device to function normally.
To fix this problem, just replace the cable with another, similar, or connect the monitor through a different port.
Attention! Keep in mind that when connecting and disconnecting the connector, the monitor must be turned off, as static voltage can damage the connector.
There are no suitable drivers for the video card.
This problem occurs on older devices whose software has not been updated for a long time.
To fix this problem, you need to go to the official website of the manufacturer of the video card installed on the PC. Here follows Download and install the necessary program specifically for the installed model.
Attention! In order to find out the model of the video card, just right-click on the free space on the desktop and open "Properties" or "Screen Resolution" (depending on the version of Windows).
Incorrectly configured screen
The most common problem that is very easy to solve. In order to configure the connected screen, you need to go to special settings.
Troubleshooting Methods
In most cases, malfunctions are easily fixed by replacing components.. However in 
case if the problem is to configure, any user can solve it.
This is done in several simple ways.
- "Start" - "Control Panel" - "Screen".
- The keyboard shortcut Win + P.
In open settings user can access the settings of the connected display. Often, the monitor turns off if the connection method is incorrectly set. There are four in total.
- PC screen only. In this case only one connected monitor works.
- Duplication. Images on two connected devices the same.
- Expansion. Desktop increases due to additional screen.
- Second screen only. Image will be broadcast tonly to the second connected device.
If only one monitor is connected, then the mode should be “PC screen only”. Otherwise, the screen may not work properly.
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