LCD TV is an indispensable electrical appliance at home. Many people watch TV before and after meals, which makes our family life more colorful. Generally, the newly bought LCD TV will not have any problems, even if there are problems, it is still under warranty. Just take it for warranty. The LCD TV is broken. What should I do after the warranty period expires? How to repair the TV Can it be repaired?

The following are some common faults and maintenance methods of TV sets to share with you.

Common faults and maintenance methods of LCD TV

Common fault of LCD TV: TV has no image, but has sound.

Common failure causes of LCD TV: it may be that the color system is not adjusted correctly, or the tuner is out of order.

TV maintenance plan: First, check whether the relevant parameters of the tuner are normal, because if it is broken, there will be no image input. If it is determined that the tuner is faulty, it will be replaced. If there is no fault, you can adjust the color system of the TV.

How to repair the common faults of LCD TV?

We can judge whether the TV picture tube is normal in this way: if you can see the sound of discharge of the TV lamp at the moment when the TV is turned off, it is normal.

Common faults and maintenance methods of LCD TV II

The common phenomenon of TV: TV magnetization.

Common failure causes of TV: the internal degaussing resistor of TV is damaged, the TV vibrates violently, or the TV is affected by the magnetization of nearby magnetic objects. , it will cause the color pure magnetic ring or deflection coil of the TV set to shift, resulting in failure.

Television maintenance scheme: the picture is normal but the screen has halo, which needs to be solved by professional degausser. If this problem cannot be fixed, it is likely that the degaussing element is broken and needs to be replaced. This fault is best repaired by a professional repairman.

Common faults and maintenance methods of LCD TV

Common failure phenomenon of TV: the whole TV is not powered on.

Common failure causes of TV sets: the off-board power supply or on-board power supply of TV sets is faulty, which is usually more likely.

TV maintenance plan: If the fault is caused by the power supply, it can be normal as long as the parts are replaced. If the drive board is faulty, it is necessary to check whether the voltage related to the power supply is normal. If the drive board is faulty, the two sets of power supplies will have no output voltage. If there is something wrong with the voltage, there must be something wrong with the drive board and it needs to be replaced.

How to repair the common faults of LCD TV?

Common faults and maintenance methods of LCD TV IV

Common faults of TV: the green light of the power light is always on, but the display screen is black and there is no backlight.

Common causes of TV failures: failure of power supply circuit of high-voltage board.

TV solution: Images appear on the display screen, usually because there is something wrong with the power supply circuit of the high-voltage board, so it is important to check whether the power supply and switching voltage of 12V are normal.