Most of humanity spends its evenings in front of the TV. So you came home, habitually turned on the TV and noticed that the image appears much longer than usual. Why is this happening? Is this a malfunction, and what to do in this situation?
The TV turns on for a long time: the main reasons
As a rule, the process of turning on the TV takes no more than ten seconds. Some users over time note an increase in turn-on time to a minute or more.
Even if after a long time the TV is working properly, you should understand that something is wrong with your device. If possible, contact a service center to avoid more serious troubles. Modern television technology is a sophisticated electronic system, with a huge number of interconnected elements. For example, if you do not replace one failed capacitor in a timely manner, this can subsequently provoke the final failure of the entire device.
As experience shows, there are several main reasons why the TV turns on for a long time:
- the cathode ray tube resource has been developed (only for kinescope models);
- malfunctions in the power supply;
- failure of the inverter;
- problems with the image scanning system.
Cathode ray tube resource
In CRT televisions, the image was projected onto the surface of a cathode ray tube, which has a limited lifespan. With long-term operation, the kinescope resource is developed, while it is noted:
- decrease in brightness and saturation of the image;
- uneven glow of the surface of the tube;
- increase in time of appearance of the image after inclusion.
REFERENCE! Running out of power in CRT televisions is not a malfunction - it's just an aging process. As a rule, it occurs gradually over several years.
At present, kinescope models are morally obsolete. Therefore, when developing their resource, it is more rational not to try to repair them, but to look at modern models.
Malfunctions in the power supply
Power supply unit - provides energy conversion of the electric network and its distribution across all elements of the device. This is the "heart" of the TV. There are two types of faults in the power supply. Some are associated with the development of a resource, others with the failure of individual components.
In almost all power supplies there are electrolytic capacitors, which eventually lose their capacity. As a result of this, the time for supplying power to the component parts of the device increases, and, accordingly, the switching process itself.
In addition to the natural aging process of the elements of the power supply, its components often fail due to power surges. This circumstance can lead to an increased turn-on time of the TV, and may also be accompanied by extraneous noise during operation and image blinking.
Failures in the power supply unit over time can lead to failure of other elements of the device and its final breakdown.
IMPORTANT! If you notice a malfunction in the power supply, contact a service center immediately.
Inverter failure
The inverter is responsible for the operation of the backlight system in LCD TVs. With its help, the brightness of the LEDs is controlled. When the inverter fails, the intensity of the screen glow is violated or the time for the appearance of the image after switching on increases (sound can appear much earlier than the picture).
Problems with the image scanning system
The image scanning system consists of line and frame scanning, and as the name implies, is responsible for the direct construction of the image on the screen. The problems in the operation of these elements are also signaled by: instability of the image on the screen, absence or incorrect display of pixels of some rows or columns.
What to do if the image does not appear immediately when you turn on the TV
If when you turn on the TV, the image began to appear with a delay, this indicates a minor malfunction, which, if not taken, can eventually lead to the failure of the device. The main advice - if you are not a repair specialist, do not try to fix the problem yourself, but contact a specialist.
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