Monitor flickering when connected via HDMI is a fairly common problem.
If you connected your monitor via an HDMI cable and are faced with the problem of periodic blinking or flickering of the image, then my simple advice will help you return the monitor to working condition.

It is important to understand that such a problem can be a wake-up call. This behavior may indicate problems with the video card or the monitor itself. If the hardware test reports that there are no breakdowns, then the hdmi wire is to blame.

The first thing to do is try to use the shortest possible wire. In most cases, this advice helps. But this doesn't always happen.
In my case, a 10-15 centimeter wire was used, much shorter. The day was spent identifying the problem. The computer and system were fully functional, but the monitor continued to flicker periodically. By the way, during this flickering, the drivers on the monitor flew off.

Straining the memory and pulling it out specifications hdmi, a simple and affordable solution to the problem was found.

A little theory. HDMI is quite demanding wiring. The operation of its channel can be disrupted by waves from the outside, surges on the ground wire, and much more.
The most interesting thing is that even residents of modern cities are not guaranteed normal grounding. And if you use the pilot, then it’s even more luck.
As a matter of fact, it is the ground wire that causes the flickering screen problem.

Solving the problem of monitor blinking when connected via HDMI.

Disconnect the monitor from the power supply and rewind the silver contacts with electrical tape.
The grounding contacts have a recess; you can put a piece of electrical tape in it and additionally glue the tape on top.
So that you understand what exactly needs to be de-energized, I am attaching a photo.


After such an upgrade of the plug, the blinking of the monitor should go away or be reduced to a minimum.

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 - click 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.

Users encounter this problem quite often. The main difficulty lies in determining the cause of the problem. It is extremely difficult to answer unequivocally why the TV screen blinks? The diagnostic result directly depends on the signal source. Hardware faults cannot be ruled out. It is likely that the failure of basic components is the cause of interference. Now let's look at the most common causes of TV screen flickering, and also analyze effective ways to solve this problem.

Technical problems

What to do if your LG TV screen is flickering? Start with hardware diagnostics. Check the functionality of the basic modules of the TV device. It is extremely common for high-voltage capacitors to burn out in the power system, namely in the inverter. In CRT models, cracks appear in the soldering. Mechanical defects visually resemble a ring. They appear in those places on the board where all elements are heated. Such a breakdown also occurs due to high voltage.

If the inverter does not produce the required voltage level, then the LED backlight begins to blink. It may flicker when you turn on your LG TV. In some situations, the LEDs go out completely. Therefore, some parts of the screen remain completely dark. To solve the problem, you need to check the functionality of the capacitors and LEDs. In some situations, it is necessary to resolder boards in places where there is increased voltage.

Separately, we note that screen flickering due to board failure is more often typical for Smart TVs from Samsung. This is due to a manufacturing defect. Sometimes it is possible to slightly reduce the negative effect by adjusting the brightness.

Problem due to TV signal

If the LCD TV screen starts flickering after connecting a certain power source, then the problem is due to the connection. For example, a defect may appear due to a malfunction of the antenna, cable or receiver. In order to eliminate the causes of problems associated with television signal sources, the latter should be thoroughly tested.

Satellite TV

To set up satellite TV broadcasting, you need to use a receiver, a signal source and a TV. The source of the television signal is satellite dish or cable carried by providers. The receiver is used to decrypt the satellite signal. The signal is transmitted to the TV via HDMI or RCA interface. Much depends on the model of the TV device.

If one of the items listed above is malfunctioning, the screen will Samsung TV will blink, the image will be distorted. It is possible that other defects may appear.

If you are using a satellite TV provider and are having problems, just call hotline. When a satellite dish acts as a signal source, checking the connection begins with this element.

Do not rush to dismantle or move the antenna, since then it will be extremely difficult to point it in the desired direction. This requires additional equipment. First just unplug antenna cable from the decoder. A notification will appear on the TV screen indicating that there is no signal.

If the flickering stops, then the problem is in the cable or satellite converter. It is much easier to re-install the cable. It will take a minimum of time. Connect the new cable to the receiver and check the broadcast quality. Has the screen started flickering again? This indicates a malfunction of the satellite converter - a special device that receives a signal from the dish. You will not be able to repair the converter yourself. Seek help from specialists.

In a satellite connection, the receiver is responsible for the image quality. Therefore, the performance of the decoder determines the comfort during viewing. How to test the operation of the receiver? First, disconnect it from the external receiving cable. It cannot be ruled out that failures occurred in the signal receiving module.

An alternative solution is to replace (if possible) or disconnect the cable that is connected from the decoder to the TV. Switch it to another signal source. For example, if you selected analog broadcast and the blinking stops, then the problem has been identified correctly.

What should I do if the display continues to flicker after replacing and unplugging the cable? This indicates that there is a hardware problem with the TV. Contact the service center.

Cable TV

What should I do if the picture on my TV flickers? The user doesn't have many options. Inspect the television cable that was laid by the provider in your apartment. If mechanical damage is detected, change the cable.

Practice shows that problems with color and other interference appear due to a broken plug. It is very difficult to identify a breakdown. Disassemble the plug and check the integrity of the element.

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If changing the signal source makes the screen flicker disappear, then the problem has been detected correctly. Contact the provider's call center cable television and report any problems you encounter. First try to repair or change the plug yourself. It is possible that it broke as a result of a short circuit.

Analog and digital TV

If the picture on the TV flickers in analogue or digital connection, then solving the problem will not be difficult. First, check the antenna, especially if it is equipped with electronic devices, providing signal amplification. Move the antenna. Has the flickering gone away? Disconnect the cable from the TV antenna. Have the defects disappeared? You will have to change the cable or antenna.

Flickering is far from the only glitch that users encounter. Very often the image is distorted and the TV beeps. All this may be a consequence of a malfunction of an ordinary antenna.

TV connected to computer

Modern TV models can be very easily transformed into computer monitor. The main thing is that the PC or laptop is equipped with an HDMI interface. Of course, there are other ways to configure synchronization, but this option is the best.

What to do if after setting up the connection the TV screen flickers. There may be several reasons. Let's look at the most common ones - incompatible frequency or resolution parameters of the video card with the settings of the TV device.

If a signal is transmitted through the HDMI cable that exceeds the frequency supported by the TV, then frame skipping will occur, that is, the picture will begin to flicker. It is possible that the image will be completely absent.

Identical problems may arise due to incompatible output resolution values ​​of the computer/laptop graphics adapter with the parameters of the TV device. To resolve the error that appears, follow the simple step-by-step instructions:

TV device screen modern models– a matrix that is illuminated by LEDs and other lamps. The backlight provides the necessary image brightness. LCD TVs create the desired brightness by intense flickering of all backlight elements.

A long delay between pulses will cause unsatisfactory image brightness. In some situations (for example, when high-frequency LED light falls on a TV screen), the pause between pulses becomes longer, or so it seems. It may seem to the viewer that the screen has begun to blink.

If the cause of the problem is insufficient brightness of the backlight, then you just need to change the settings. Increasing the Brightness value will make the colors bright but washed out. The problem is solved by changing the contrast settings.

Note.