The TV has always been an important audio-visual equipment in our daily home life, but the TV will fail after being used for a long time. At this time, we need to solve the problem. There are also some problems that do not need to be repaired by professionals. We can solve it with our own hands. In order to avoid improper operation in the face of TV malfunctions, let's take a look at Sony TV malfunctions and solutions.
When the Sony TV is working, the screen will show up and down, and it will show up and not show up.
Solution:
When we face this phenomenon, our common method is to tap the TV, and it will be fine with just one shot. This is the phenomenon of false welding of TV sets, which is also a relatively common problem. When the false soldering phenomenon causes the TV to automatically shut down, during the maintenance process, the TV cabinet needs to be disassembled, and the switching power supply and the solder joints at the line scan output circuit of the TV must be carefully checked. First use the method of turning the circuit board over to find the fake solder joints. Using this method, the focus is to find a component with a relatively large current and a relatively high temperature. A circle of cracks will appear in its fake solder joint. Generally, the focus is on the larger components and the components with higher temperature. At the same time, use a screwdriver and an insulating rod to press on a certain place on the circuit board. When it is pressed, this place will change significantly, which proves that the fake soldered component is nearby.
When the Sony TV is turned on, the screen turns black when the screen turns on, or the screen goes black after a period of use, but the sound is still there.
Solution:
When the TV is turned on, the screen flashes and then the black screen appears. The general fault is that the high-voltage board of the TV has a problem. At this time, it is best to replace the high-voltage board. If the high-voltage board is not replaced, the TV cannot be damaged. Solve it fundamentally.
In addition to the TV's high-voltage board will cause this failure in the TV, the LCD TV's power board will also cause this problem in the TV. This is mainly because the output voltage of the power board fluctuates or the power board has been working for too long. The main power supply enters the protection state. At this time, the editor recommends that you replace the power board with a universal high-power power board 24v8a or 10a power board, so that the output voltage of the power board can be more stable.
The Sony TV display screen is malfunctioning and no image is displayed
Solution:
It may be caused by the incompatibility of the graphics card, which can pass the Direct Draw test. If the test passes, this is not the reason.
Check the PCI contact port, which is also caused by the poor contact of the PCI interface. You can change the PCI slot to test.
If the first two are okay and the problem has not been resolved, the only possibility is that the board is damaged, and you must consider changing to another card for testing.
After the Sony TV is turned on, the screen appears initialization failure, or the program cannot be started
Solution:
That is an error in the shortcut. Unable to hook the application, the shortcut cannot be started, delete the shortcut and re-create or re-install the program to solve the problem.
When the Sony TV is turned on, the whole machine does not turn on and the indicator light does not flicker
Solution:
When a Sony TV is turned on, as long as part of the circuit is abnormal, the TV will not turn on and the indicator light will not flash. Press the power switch of the TV, the buttons of the TV do not respond, and the indicator light of the TV flashes. When the circuit output of the power supply board is tested with a multimeter, it is normal, and the main power supply has no current output, and the failure of the key board can be eliminated.
Disconnect the power supply line from the power board to the main board, and start the power board forcibly. The power output of each group of circuits measured by the multimeter is normal, indicating that the power board is not faulty.
Correctly select the TV screen line, the blue and white signal lines are five teams, and use a multimeter to measure the screen line. After checking the screen cable for correctness, drive the power detection tool to turn on the TV and observe the TV screen. There is no image display, the TV backlight is on, and the TV shows a gray screen.
Use a multimeter to measure that the power supply of the TV screen is normal, there is no voltage after the insurance, and the insurance appears to be open after the power is off. Replace the insurance. After replacing the insurance, the TV still has no image display. After upgrading the TV program, there is still no image. Use a multimeter to measure the test points of the logic board. An abnormality is found. The DC chip is replaced. The TV voltage is normal and the screen starts to display images.
After restoring the line connection of the whole machine, connect the power supply, the indicator light of the TV turns green, and the TV screen has snowflakes and sound. After adding the TV video signal, the image of the Sony TV is normal, indicating the troubleshooting.
In fact, Sony TVs have the function of indicating fault codes. Under normal circumstances, the cause of the fault can be determined by observing the blinking of the indicator light.
The indicator light flashes twice, and the power supply circuit of the main board or power board is faulty;
The indicator light flashes 5 times, the mainboard DC power supply circuit is faulty;
The indicator light flashes 6 times, and the backlight fails;
The indicator light flashes 8 times, and the audio channel is faulty;
The indicator light flashes 10 times, and the digital circuit of the main board fails;
The indicator flashes 12 times, and the high-frequency channel fails;
The indicator light flashes 13 times, and the power board or LCD screen fails;
The indicator flashes 14 times, and the logic board is faulty.
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