The network TV system has been in a state of being at home after being updated, and the screen will

Check if there is a power short-circuit fault, if the power supply is short-circuited, there will be a black screen.

In the event of a situation, the user should contact the maintenance personnel for maintenance; Check whether the TV hardware is damaged,If there is damage,The TV can't work properly,A black screen appears,Need to be repaired or hardware replaced。 Common causes and solutions for black screen after TV system update:1. Power failure:

Power short circuit or power damage,It will lead to a black screen of TV,Only if the user contacts professional maintenance personnel for power supply troubleshooting,And then repair,Can we help the TV return to normal work。 2、Shutdown after update:After updating Pixiang, some TV systems are shut down,So there will be a black screen of TV,Base plexus users only need to restart the TV,You can normal**TV。

3、System error:After the system is updated, there is an error in the data,The TV cannot start normally,So there is a black screen。 Users can contact the maintenance department to repair the problem, restart or reset the system.

4. Hardware failure: short circuit or damage to the switch circuit, all of which will cause the TV to fail to work normally, and a black screen will appear, if you want to solve it, the user only needs to contact the after-sales service for hardware repair or replacement.

The main reasons are:1、If the power indicator of the TV goes out,It may be that there is a problem with the power connection of the TV,Resulting in a sudden power failure。 2、The user mistakenly pressed the standby button of the remote control,The TV enters the standby state,So the black screen is displayed。

3. Caused by hardware failure, short circuit or open circuit of switch circuit, failure of high-voltage board, failure of LCD screen or screen cable, failure of motherboard chip or other components, etc. Suggested solutions: 1. When the circuit fails, the screen will turn black, and once the circuit is turned on briefly, the screen will be restored.

2. The TV will heat up after being turned on.

It will cool down after shutting down. Such a long cycle, in the thermal expansion and cold contraction.

Under the effect, some high-power devices on the circuit board are also seriously heated, and the solder feet are easy to be desoldered, such as cracks in the pads, that is, the problem of circuit on-off is easy to occur; 3. There is a lot of rain and humid air, which will aggravate oxidation and aggravate the failure. When the TV screen is round and dark, you can tap the vibration of the case, which is the method of shaking the mountain and shaking the tiger. If the screen can get back to normal, here's why.

It's easier to solve the problem. Remove the circuit board with a magnifying glass.

Find out the solder joints and fill the tin. 4. Disassemble the TV and focus on checking whether the switch circuit has virtual welding; Secondly, check whether the pin-punch components on the motherboard are faulty or virtual soldered, check them one by one, and re-solder the virtual solder joints If there is a component failure, it can be replaced with components of the same model.

In the case of the TV screen slowly blacking,First of all, you need to check whether the TV itself is faulty,The failure of the screen will lead to a black screen; The set-top box also needs to be checked, and if there is a failure, it will also cause the screen to slowly go black; The ** cable connecting the TV and the set-top box also needs to be checked,There is a problem with signal reception,The TV will also appear slowly black.

Common reasons and ways to check the TV screen slowly going black:

1、The TV itself is faulty:The user can first put the set-top box,** base slow line and TV disconnection,Turn on the TV separately,Observe whether the TV receives the signal,Under normal circumstances, the TV has no external signal, there will be a blue screen display,There are also snowflakes showing no signal reception state,You can judge whether the TV is faulty。

2. Set-top box failure: Users can use *** machine or VCD disk drive or the like to test, replace the set-top box and connect it to the disk machine, if the TV can work normally after connecting the disk machine, there is no black screen in the fight model, that is, the set-top box has no problem, on the contrary, the set-top box is faulty.

3. Failure of the line: The set-top box and the TV are working normally, the user can connect the line to other set-top boxes and TVs, and then turn on the TV.

1. It may be that there is a problem with the power supply of the TV. 2. It may be caused by hardware problems, such as power modules.

Suggested Treatment:

1. The power supply circuit is abnormal, first check whether the 12V voltage is normal, and then check the 5V voltage, if there is no 5V voltage or the 5V voltage becomes very low, there is a problem with the input stage of the power supply circuit. This kind of failure is very common, generally because the fuse is burned or the voltage regulator chip fails, and the relevant parts can be replaced.

2. There is a problem with the circuit driving the backlight, connect the display to the host to start up and check, close to the screen and observe carefully, the common faults of the high-voltage board are the fuse of the high-voltage board itself burned off and there is no 12V** and switch chip failure, etc., replace the relevant destroyed parts.

3. Replace the power module, high-voltage board, LCD screen or screen cable. Pay attention to maintenance. Deal with it in a timely manner.

4. Find a professional to repair the TV.

Reasons why the TV screen repeatedly goes black:

1. It may be that there is a problem with the TV power supply, such as: poor power contact, power cord failure, etc. Or it is caused by excessive voltage.

2. It may be caused by hardware problems, such as power modules, high-voltage boards, LCD fiber stool groups or screen cables.