Terrestrial wave digital TV will have a black screen for about an hour10

This is common knowledge in physics.

For 3 hours, the ground wave was very weak.

The black screen of terrestrial wave wireless digital TV is not that the signal is bad, it is very likely that the front end of the TV station has no input signal, and it is necessary to contact the local TV station to deal with it. If the signal is not good, there will be a mosaic phenomenon, which is generally a problem at the front end of the TV station.

Will the TV screen go black when it rains on a cloudy day?

This problem is mainly due to the fact that the vicinity of the high-voltage cap is too dirty, which causes high-voltage discharge after being damp, resulting in the smell of ozone. I don't know if you have the hands-on ability. Because after the TV is turned off, there is still high voltage at the high-voltage nozzle of the picture tube, when operating, you need to discharge first, if you have no experience, do not rashly do it, so as not to be shocked.

Solution: 1. Check whether the TV has been connected to the power supply, whether the power switch of the TV has been turned on, if not, turn on the power switch to solve the problem.

2. Check whether the remote control turns off the screen of the TV so that the TV is in a standby state, you can point the remote control at the TV, and press the "Power" button of the remote control to turn on the TV screen and return to normal state.

3. Check whether the TV has signal input, generally the TV will detect that there is no signal input, and the black screen will be in standby mode, at this time, you need to check whether the cable TV signal line or digital TV set-top box is well connected to the TV, if the loose contact is poor, fix it to solve the problem; In addition, it is also necessary to check whether the signal source of the TV has been switched to position, for example, the cable TV signal input needs to be switched to the "TV" mode; The input of the digital TV token bureau number needs to be switched to the "**" mode.

4. If the above methods still can't solve the problem, it is considered that the hardware failure of the TV is caused by the cover liquid, such as the short circuit of the motherboard line, the TV screen is damaged, the cable is loose, etc., at this time, you should contact the after-sales service of the TV for a comprehensive inspection and warranty of the TV.

1. It may be that the TV has a virtual soldering problem. 2. It may be that there are virtual solder joints in the output part of the line. 3. It may be that the electronic components are in poor contact with the pads, or the connectors are loose. 4. It may be that the cable connecting to the motherboard is not in contact.

Suggested treatment: 1. Carefully check whether the soldering points of each part of the motherboard have desoldering, especially the high-voltage part, the tailstock plate of the picture tube and the parts around the radiator. Be observant.

2. It is recommended to repair the viewing plate comprehensively, which can be repaired after such treatment.

3. Disassemble the TV and focus on checking whether the switch circuit is soldered; The second is to check whether the parts on the motherboard are faulty or virtual welding, check the loss one by one, and re-weld the virtual solder joints; If there is a component failure, it can be replaced with a part of the same model.

4. Finally, if the above methods do not work, you can find a professional to provide door-to-door service, if your after-sales service has not expired, you can find after-sales service personnel to help. Don't worry too much. Don't spend money, let the after-sales service staff help you repair and check, regular warranty, and deal with the problems of the TV.

Summary. 1. The data cable of the display screen has poor contact, reconnection or soldering.

2. Interference from the outside world similar to long-wave signals, resulting in temporary inability to receive the program's signal, and the interference is gone.

3. Digital set-top box failure, repair or replacement.

5. **Consult the Radio, Film and Television Bureau to see if it is in arrears, and if so, it will be fine.

6、The internal video amplifier circuit、Field circuit、Power circuit and other faults inside the TV will cause a black screen,Find a professional maintenance master to repair it。 , I hope mine can help you!

Hello dear,Some channels on TV can be watched,Some**The screen will be black in a few seconds,1、The data cable of the display screen has poor contact,Chongzhou has a new connection or welding。 2. Disturbed by the outside world similar to the long-wave letter book state number, resulting in the temporary inability to receive the program's signal, and the interference is gone. 3. Digital set-top box failure, repair or replacement.

4. **If the signal connection cable is falsely connected or in poor contact, reconnect. 5. **Consult the Radio, Film and Television Bureau to see if it is in arrears, and if so, it will be fine. 6、The internal video amplifier circuit、Field circuit、Power circuit and other faults inside the TV will cause a black screen,Find a professional maintenance master to repair it。

, I hope mine can help you!

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The black screen of the TV is a malfunction phenomenon of the TV, and it is also the most common ,..2.What's going on with the black screen of the TV.

3.First of all, it may be caused by the abnormal power circuit of the training hand, which is manifested as the button does not respond when pressing the panel, and the indicator light does not light up. One possibility is that there is a problem with the input stage of the power circuit.

4.If the circuit source is normal, then there may be a problem with the circuit driving the backlight. 5.

What to do if the TV screen is black. 1. The power circuit is not suitable for normal causes, first check whether the 12V voltage is normal, and then check the 5V voltage in hopes to help you.