1, the internal circuit load of the TV is too large or the transformer core is not glued, which causes the inductor or transformer core to vibrate and make noise;
2. The high-voltage package of the internal circuit of the TV set makes noise due to moisture leakage;
3, the internal circuit of the TV, the sound from the high-voltage package;
4. Noise generated by the leakage of the TV picture tube base;
Second, the treatment method:
1, if the noise is not big and does not affect normal use, don't pay attention to it. If the situation seriously affects the use, it is recommended to contact the TV after-sales service for comprehensive inspection and warranty.
2. When the machine has abnormal sound or smell, please turn off the power immediately and unplug it. If it is confirmed to be abnormal, don't continue to use it. Please have it repaired by a professional.
3. Open the back cover of the TV, turn on the power supply to make the TV work (it doesn't matter whether the signal source is connected or not), carefully identify the place where the noise occurs, and touch the faulty transformer or coil with a screwdriver after preliminary determination. This kind of touch will change the conditions of noise generation and make it disappear or increase. When the transformer or coil that produces noise is completely determined, it can be loosely fixed by pouring adhesive into the iron core of the transformer or coil.
Extended data:
Troubleshooting of TV set;
Fault phenomenon: TV full-screen vertical color bar?
1, if the TV is ok when it is turned on, it will turn into a flower screen after a while, and the screen will light up after the flower screen changes; Generally, the voltage can be corrected by measuring the GAMMA on the logic board. The common fault is AS 15-G. You can touch as15-g to see if it is hot.
If it is hot, it is judged as AS 15-G fault; It mainly measures whether each gamma voltage is abnormal, so as to judge which gamma voltage is wrong, and replace it with a new AS 15-G to return to normal;
2. If the color of the screen is confused, it can generally be judged as a problem of the LCD screen itself; Because LCD displays images with backlight and circuits that can change the arrangement direction of liquid crystals, the circuits control the dots of three colors of liquid crystals RGB respectively, and once it fails, it will lead to color fading or screen failure;
3. Generally, TV screen display is related to TV hardware failures, including screen failures, screen line failures, circuit and capacitor failures on the motherboard, and other internal parts failures, which may lead to screen display; Ordinary users suggest contacting TV after-sales service for comprehensive inspection and warranty.