What should I do if a Sony LCD TV fails? How should I determine the location of the fault? Today, the author took everyone to understand the common faults of Sony LCD TVs, and introduced the idea of ​​repairing Sony TVs. 
Sony LCD TV common fault
1, LCD screen failure
Screen failure: cracked screen, dark screen, black screen, white screen, etc.
Screen display failure: horizontal lines, bright lines, dark lines, etc. appear on the screen;
Faulty screen content: image color cast, dark raster, etc.
2, the main driver board failure
Three power-on: no image, no grating, no sound, power indicator light is not on, light does not turn on, cold can not open and other failures;
Abnormal boot: boot automatically, change the volume automatically increased;
The sound is not normal: no sound, hoarseness, distortion, etc.;
Automatically shut down from time to time: automatically shut down shortly after power on, remote control does not work;
The sensitivity is not high, there is no audio and video in the AV, there is no sound in the video, there is no image black screen, Huaping and other fault sound.
3, display driver board failure
The image is not normal: the image is shake-drawing, the image is color-shifted, the white screen is blank, and the image is not black at regular intervals;
Screen display failure: the screen has a grating, horizontal lines, bright lines, vertical lines;
Image cannot be adjusted: Brightness cannot be adjusted.
4, power board failure
After the power is turned on, the indicator light is off, there is no image, no sound, no raster black screen, automatic shutdown from time to time, the light does not turn on, there is abnormal noise in the machine and other faults;
5, high voltage board failure
The backlight is not lit: the LCD screen is not displayed, the screen is black, and the screen is not automatically black.
Sound with no picture: The sound is normal, the remote control is normal, but there is no picture, there is no image failure on the black screen.
6, high-frequency board failure;
Boot blue screen no signal, picture flash, search Taiwan, automatic search does not save Taiwan, treadmill, image snow
Sony LCD TV fault code
The indicator light flashes 2 times. The power supply circuit on the main board or the power board is faulty. The indicator blinks 5 times. The motherboard DC power supply circuit fault LED flashes 6 times. The backlight fault LED flashes 8 times. The audio channel fault LED flashes. 10 times, the fault signal on the motherboard's digital circuit flashes 12 times, the fault indicator on the high-frequency channel flashes 13 times, the fault LED on the power board or LCD screen flashes 14 times, and the logic board fails.
Finding the location of the Sony TV's fault, will it be difficult to repair it?
1, press the TV's power switch, the TV's button does not respond, the TV's light flashes, use a multimeter to test the power board circuit output is normal, the main power supply no current output, you can discharge the key board failure .
2. Disconnect the power supply board from the power supply board to the main board, and forcefully start the power supply board. The power output of each group of circuits measured by the multimeter is normal, indicating that the power board is not faulty.
3, the correct selection of the TV screen line, blue and white signal line for the five teams, using a multimeter to measure the screen line.
4, after checking the screen line is correct, the driver detects the power tool to turn on the TV power, observe the TV screen, no image display, the TV backlight light, the TV appears gray screen.
5, using a multimeter to measure the TV screen power supply is normal, after insurance, no voltage, after the power outage insurance appears to open the way, replace the insurance.
6. After the insurance is replaced, the TV still has no image display. After upgrading the TV program, there is still no image. Use a multimeter to measure each test point of the logic board. If abnormalities are found, replace the DC chip. The TV voltage is normal and the screen starts to display images.
7, after restoring the line connection of the whole machine, connect the power, the TV indicator light turns green, at the same time the television screen has snowflake at the same time there is sound.
8. After the television video signal is added to the Sony LCD TV, the image is normal, indicating that troubleshooting is in progress.
Sony LCD TV common fault
1, LCD screen failure
Screen failure: cracked screen, dark screen, black screen, white screen, etc.
Screen display failure: horizontal lines, bright lines, dark lines, etc. appear on the screen;
Faulty screen content: image color cast, dark raster, etc.
2, the main driver board failure
Three power-on: no image, no grating, no sound, power indicator light is not on, light does not turn on, cold can not open and other failures;
Abnormal boot: boot automatically, change the volume automatically increased;
The sound is not normal: no sound, hoarseness, distortion, etc.;
Automatically shut down from time to time: automatically shut down shortly after power on, remote control does not work;
The sensitivity is not high, there is no audio and video in the AV, there is no sound in the video, there is no image black screen, Huaping and other fault sound.
3, display driver board failure
The image is not normal: the image is shake-drawing, the image is color-shifted, the white screen is blank, and the image is not black at regular intervals;
Screen display failure: the screen has a grating, horizontal lines, bright lines, vertical lines;
Image cannot be adjusted: Brightness cannot be adjusted.
4, power board failure
After the power is turned on, the indicator light is off, there is no image, no sound, no raster black screen, automatic shutdown from time to time, the light does not turn on, there is abnormal noise in the machine and other faults;
5, high voltage board failure
The backlight is not lit: the LCD screen is not displayed, the screen is black, and the screen is not automatically black.
Sound with no picture: The sound is normal, the remote control is normal, but there is no picture, there is no image failure on the black screen.
6, high-frequency board failure;
Boot blue screen no signal, picture flash, search Taiwan, automatic search does not save Taiwan, treadmill, image snow
Sony LCD TV fault code
The indicator light flashes 2 times. The power supply circuit on the main board or the power board is faulty. The indicator blinks 5 times. The motherboard DC power supply circuit fault LED flashes 6 times. The backlight fault LED flashes 8 times. The audio channel fault LED flashes. 10 times, the fault signal on the motherboard's digital circuit flashes 12 times, the fault indicator on the high-frequency channel flashes 13 times, the fault LED on the power board or LCD screen flashes 14 times, and the logic board fails.
Finding the location of the Sony TV's fault, will it be difficult to repair it?
1, press the TV's power switch, the TV's button does not respond, the TV's light flashes, use a multimeter to test the power board circuit output is normal, the main power supply no current output, you can discharge the key board failure .
2. Disconnect the power supply board from the power supply board to the main board, and forcefully start the power supply board. The power output of each group of circuits measured by the multimeter is normal, indicating that the power board is not faulty.
3, the correct selection of the TV screen line, blue and white signal line for the five teams, using a multimeter to measure the screen line.
4, after checking the screen line is correct, the driver detects the power tool to turn on the TV power, observe the TV screen, no image display, the TV backlight light, the TV appears gray screen.
5, using a multimeter to measure the TV screen power supply is normal, after insurance, no voltage, after the power outage insurance appears to open the way, replace the insurance.
6. After the insurance is replaced, the TV still has no image display. After upgrading the TV program, there is still no image. Use a multimeter to measure each test point of the logic board. If abnormalities are found, replace the DC chip. The TV voltage is normal and the screen starts to display images.
7, after restoring the line connection of the whole machine, connect the power, the TV indicator light turns green, at the same time the television screen has snowflake at the same time there is sound.
8. After the television video signal is added to the Sony LCD TV, the image is normal, indicating that troubleshooting is in progress.
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