Doesn't Show The TV: Why Did The Image Disappear, But It Works And Talks? Why Is One Half Of The Screen Black?

2024 Author: Beatrice Philips | [email protected]. Last modified: 2024-01-18 12:09

The TV stopped showing - not a single technique is immune from such a breakdown. It is important to quickly and competently figure out the malfunction and, if possible, fix it yourself . In most cases, the problem is indeed simpler than it first appears.

Breakage type

There are several typical breakdowns. In the first case the TV just won't turn on , does not respond to remote control and manual actions. Black screen, absolute silence and no signs of equipment operation. In the second case, the TV does not show anything, but there is sound.

Black screen

The most commonplace reason is cut off the electricity . During the day, rarely anyone thinks about it, and a person starts trying to turn on the TV, rearrange the batteries of the remote control, or violently press all the buttons.

And only then he notices that the backlight does not work either. The point may be a planned shutdown or knocking out traffic jams. This option should be ruled out immediately.

The main possible causes

1. The batteries in the remote control are empty . As it turns out, this is the second most common problem with which a black TV screen can be associated. If it is not possible to immediately change the batteries, turn on the device manually.
2. Voltage surges . The TV may break down suddenly. Something clicks in the device, the monitor stops showing. The click can be associated with the operation of a protective relay in the case itself. That is, a fuse is knocked out in the power supply - this often happens during a thunderstorm. In most cases, the problem is eliminated by itself: the black screen "hangs" for several seconds, and then everything returns to normal. But a power surge can also lead to breakdown. If there is a burning smell, sparks, smoke and even flames are noticeable, you must urgently pull the plug out of the socket. You should act according to the situation.
3. The cable is loose . If the cable is not securely connected to the TV jack, it can also cause loss of picture. True, there is more sound in such a situation, but different options are possible. Turn off the TV, take out and insert the plugs of the antenna wires and the electric cable into the corresponding connectors.
4. The inverter is out of order . If the screen is not completely black, but the image distortion is significant, and the sound appears with a delay, the inverter in the TV may have broken. It can be returned to service with a soldering iron, but for this you need to understand electronics.
5. Power supply defective . In this case, you will have to ring each contact on the board. First, remove the housing cover, then carefully inspect the wires for integrity, existing creases and noticeable damage. The capacitors should also be inspected. The main thing is that there are no bloated parts. Then you need to test the voltage with a special tool. It must comply with the norm. If the TV reacts to tapping, then there is poor contact in the power supply. The contacts must certainly be checked and connected, if necessary. In an amicable way, the whole power supply should be replaced.
6. Breakage of the matrix . In this version, half of the TV can be black, half in stripes. The reason for the defect in the matrix is the fall of the TV, the indentation. This is the most unfavorable situation, since repairs can be too costly: often, TV owners simply purchase new equipment.

There is sound, but no picture

And such situations are not uncommon, the reasons may also be different. Why the TV does not show, but everything is in order with the sound - we will analyze below.

1. The video processor is damaged . This problem can manifest itself gradually, or it can arise overnight. It is usually expressed by the appearance of color stripes and incorrectly displayed shades. One of the colors may disappear altogether. The sound is either good or is transmitted with a delay. The problem can be solved only by replacing the video processor.
2. The backlight unit is broken . The screen does not transmit any picture, but the sound is heard well. A simple diagnosis should be carried out - the TV will have to be turned on at night (or simply move the equipment to a dark room). Next, you need to take a flashlight, bring it close to the screen and turn on the TV. The place where the rays of light fall will give an image with contrasting squares. Parts will have to be replaced at a service center.
3. The train is deformed . The cable itself is located on the matrix, and it is relatively easy to disable it - for example, if the TV is not transported carefully enough. If earlier horizontal stripes were seen on the TV screen in some areas, if ripples and interference appeared with a high-quality signal, if the screen itself was duplicated or a reduced picture “jumped”, it may be a deformed loop. You will also have to contact the masters to replace the loop.
4. Broken decoder . It appears in wide stripes on the screen. The point is in the dysfunction of the loop contacts. The situation is very serious and many of the "insides" of the TV will have to be changed. Probably, buying new equipment in this case is more prudent.
5. The capacitor housings are swollen . The image on the screen is lost, but the sound works perfectly. You need to open the back cover of the device, carefully examine each capacitor. Be sure to check them by touch. The defect is not always noticeable visually, therefore tactile testing is more reliable. If swollen parts are found, they will have to be replaced with new ones.

If you are not sure that you can cope with the problem yourself, then you will have to call the wizard. But usually, if the TV does not show and does not "talk", the simplest diagnostics can be carried out independently.

Sometimes this is enough to detect a problem and deal with it.

What to do?

If there is no complex breakdown, most users are able to fix the problem themselves

• Necessary disconnect the TV from the power supply and try to make a new start in a few minutes. It happens that the matter is in a banal software failure, in which case the device will recover by itself.
• If the picture is missing, the TV does not work as usual, you can try again connect antenna cables to connectors that are located on the back of the equipment. It is possible that you will notice a defect in the plugs.
• If the image disappears or "freezes" as soon as the user tries to connect another electrical appliance, the point is in power surges. Maybe, you need to think about purchasing a stabilizer .
• Sometimes such a simple action helps: if there is no color picture, but there is sound, you need to raise the volume level to the maximum for just a couple of seconds, and then return it back . The image may appear on its own after a few seconds.

It cannot be ruled out that the channel tuning is out of order (or simply performed incorrectly). The antenna must match the signal of the TV tower, and when a suitable signal is caught, the adapter will display it on the screen.

How to set up channels:

• you need to open the settings menu in the "Channel installation / broadcast" section;
• select the item "Autotuning", press "OK" or "Start";
• then you should select the signal source - cable or antenna;
• then you need to select either the complete list or individual subdirectories;
• the only thing left is to start a search and let the program do everything on its own.

It so happens that some channels are recorded twice or not installed, in which case manual tuning will help.

Tips

If digital TV shows poorly and is periodically lost, there are several reasons for this. For example, the whole thing may be in malfunctions of the digital set-top box . It cannot be ruled out and factory defect of equipment . Finally, it should be remembered that there is prophylaxis on the channel or the provider can carry out repair work. The channel could stop broadcasting - this should not be ruled out either. Affects the signal and bad weather.

Answers to frequently asked questions about faults

Why does an inscription appear on the screen " no signal "?

You need to make sure that the set-top box is connected to the mains and that the video input is selected correctly. Not all users can distinguish between an on and off set-top box. If the set-top box is working, the indicator light on the front panel changes color from red to green.

If the screen says " No services "?

This is a sign of a weak signal. You just have to use the manual search. With manual tuning, it is possible to see the signal level, even the weakest. Most likely, you will have to change the antenna or its location.

When you can't try to fix the TV yourself?

If the matrix "flew", self-repair can only exacerbate the problem. Do not try to repair the device if there is a smell of burning and smoke. A fire situation must be dealt with as quickly as possible, and then the TV should be taken to the service.

And yet, more often than not, a black screen, and even no sound, is a consequence of something banal and perfectly normal. It happens that the owners are already calling the masters, but it was elementary to check for the presence of electricity, a working remote control or a cable that had come off.