How many kinds of faults are there in TV, and what are the common faults of TV?

Plasma TVs are better!

Plasma is an inert gas discharge display technology that uses a plasma tube as a light-emitting device, where each pixel corresponds to a plasma tube, and the light-emitting plasma tube is uniformly distributed within the display plane. The center of such a display is exactly the same as that of the image without distortion at the edges, achieving a realistic feeling in a pure flat surface.

Plasma is a self-illuminating display technology that has no background light, so there is no problem with viewing angles and brightness uniformity of liquid crystal displays, and high brightness and contrast are achieved. The design of the three primary colors sharing the same plasma tube also allows it to avoid focusing and convergence problems, resulting in very clear images. on LCD

LCD TV is a transmissive display technology in which the electrodes of transistors are made of thin-film technology, and the molecular state of the liquid crystal is controlled by actively controlling the opening and closing of each display point by scanning the device, and then changing the shadow and illumination to display the state of the image.

The liquid crystal itself does not emit light and needs a backlight, so the brightness of the backlight depends on the light transmission efficiency and the liquid crystal itself, so it is difficult for LCD TVs to achieve high brightness and the contrast ratio of plasma TVs, there are problems in response time and viewing angle, but the latest advances in LCD technology are quite amazing. At present, there is a little gap in brightness and viewing angle LCD plasma,The response time of most LCD TVs on the market has reached1316 milliseconds,12 milliseconds and8 milliseconds There are many products,It can completely solve the afterimage and tailing phenomenon in dynamic **display。

There should be those fault phenomena, which cannot be described in quantity, and no one can count how many kinds

I don't know what you mean, there are probably two kinds, one is not bright on the screen, and the other is not good signal.

When using the TV normally, there will generally be no problems, but the TV will inevitably fail after a long time, and many people are helpless in the face of TV failure, so what are the common faults of the TV? The TV is malfunctioningWhat to do? Let's follow us to learn about Wang Qiao.

What should I do if my TV fails?

Common faults of TV 1, no signal:

TV fault solution: This fault is divided into two situations, no input signal appears after the first power on; The second power on shows that the excess display appears. Maintenance method:

1) When there is no input signal, check whether the signal cable connection is normal; Check whether there is a virtual soldering short circuit in the circuit of the motherboard from the line field input to the inverter output to the main chip; Check whether the voltage of each working point of the motherboard is normal. (2) When the display is exceeded, check whether the computer input signal is out of range; Check the voltage at each operating point of the motherboard.

Common faults of TV 2, picture flash:

TV fault solution: When this fault occurs, whether the "phase" can be adjusted well with automatic or manual adjustment; Check whether the voltage at each working point of the motherboard is normal; Check whether the capacitance and resistance of the phase-locked loop have variable values; Check whether there is any false soldering and short circuit in the circuit of the motherboard from the input of the line field to the output of the inverter and then to the chip.

Common faults of TV 3, no characters:

Troubleshooting solution for TV: When there is a non-character fault, test whether the power supply from the motherboard to the logic board is normal; to check whether the logic board itself is bad; Check whether the LCD screen itself is faulty; Check if the master is faulty.

Common faults of TV 4, ghosting:

Troubleshooting solution for TV: When there is a ghosting fault, check whether the input signal is normal; Check whether the signal cable is out of specification; Check whether the VGA seat of the motherboard has false soldering and short circuit; Check whether there is any false soldering and short circuit in the circuit of the motherboard from the signal input to the chip; Check if the main chip is faulty.

Common faults of TV 5, blurred screen:

Troubleshooting solution for TV: When there is a screen failure, you need to measure whether the clock output of the motherboard is normal; Check whether there is a false soldering short circuit in the part of the circuit from the input RGB of the motherboard signal to the main chip, and whether the capacitance and resistance have variable values; Check whether the circuit of the connection seat part of the motherboard signal output to the screen has false soldering, short circuit, etc.

Common faults of TV 6, color cast:

TV fault solution: When there is a color shift fault, you should check whether there is a false soldering short circuit in the part of the circuit from the RGB input of the motherboard signal to the main chip, and whether the capacitance and resistance have changed value; Enter the factory mode, adjust the white balance, whether the normal color can be brought up; Replace the MCU or re-program the MCU if necessary; Check whether the VGA signal line is defective.

The above is what are the common faults of the TV brought to you? What should I do if my TV fails? All of it.

1.If the TV does not shoot, it will not turn on or cannot receive the signal.

2.The TV screen appears black or white.

3.The TV screen appears blurry or flickering.

4.The sound of the electric attack is noisy or silent.

5.The TV remote is not working properly.

6.The backlight of the TV is faulty.

7.The power supply to the TV is faulty.

8.The audio output of the TV is malfunctioning.

10.The signal reception of the TV is faulty.

Ten common obstacles to TV are disturbed, and common faults are one: magnetization of televisions. Answer to the cause of magnetization of the TV:

The TV has been subjected to severe vibration, the degaussing resistance inside the TV is damaged, the magnetization of the magnetic object next to the TV is affected, and the deflection coil or color pure magnetic ring inside the TV is displaced. Magnetization of the TV solution: After the TV is subjected to severe vibration, there will be more situations, and it is not certain whether it is the damage of the components or human factors.

Ask a professional maintenance person to repair it, if the screen can. Common fault 2: The TV has no power.

The reason for the lack of power of the whole machine: This is a very simple fault, which is mainly caused by the internal power supply and the external power supply of the TV. Generally, the failure rate of the external power supply will be higher.

Some are more susceptible to damage. The whole machine has no power to solve: if it is the cause of the power part, it is relatively simple to overhaul, and the problem can be solved after replacing these parts.

1.Failure to turn on: It may be caused by poor contact of the power cord, faulty power switch, damaged power strip, etc.

2.The screen cannot be displayed: It may be caused by a signal source problem, a loose interface, or a damaged screen.

3.The screen is disturbed: it may be caused by a problem with the signal source, a fault in the internal circuit of the TV, or a poor reception signal from the TV antenna.

4.Noise in the screen: It may be caused by poor antenna signal or faulty internal circuits of the TV.

5.Color distortion in the picture: It may be caused by a signal source problem, a fault in the internal circuit of the TV, or an aging screen.

6.The screen flickered: It may be caused by a problem with the signal source, a faulty internal circuit of the TV, or a damaged power board.

7.Unable to output sound: It may be caused by poor contact of the audio cable, faulty grip of the audio output interface, or damage to the audio board.

8.Noise: It may be caused by poor contact of the audio cable, faulty audio output interface, or damage to the audio board.

9.The remote control cannot be used: It may be caused by low battery power, faulty internal circuitry of the remote control, etc.

10.Other faults: such as the automatic shutdown of the TV, the inability of the TV to adjust the brightness, and other problems, may be caused by the internal circuit failure of the TV, damage to the power board, etc.