What s the deal with the TV that often goes black?

What happens when the computer screen suddenly goes black?

Start by checking that the contact is good. Check whether the contact between the graphics card and the monitor is good, and whether the contact between the graphics card and the motherboard IO slot is good, and if necessary, remove it and reinstall it again to ensure that it is installed in place and in good contact.

If there is no problem with contact, it is best to try a different monitor to make sure that the monitor is fine. If there is no problem with the monitor, check whether the CPU fan is running, if it is running, use a multimeter to measure whether the voltage output is normal to 12V, 15V, if not, you can change the power supply to give it a try.

If the black screen still appears, take out the components installed in the computer, leaving only the CPU, graphics card, and memory sticks, and the cause of the fault can be limited to the CPU, motherboard, and memory. Generally, if there is a fault in the memory, there should be an alarm sound. If the memory fault is ruled out, only the CPU and the motherboard are left.

Change to a normal CPU (should be compatible with the tested computer), boot the computer and re-test, if the black screen still appears, you can only change to a motherboard, and the problem should also appear on the motherboard. A black screen may indicate a serious problem with your computer, and you may wish to eliminate it as described above when the black screen occurs. In the process of treatment, the method of exclusion and substitution should be flexibly applied, and the phenomenon that occurs in a timely manner should be excluded.

1.When the monitor is black, there is no image display (but the current monitor on the market will display the screen when there is no signal from the host.)"There is no signal line connection"First, check whether the host power supply is well plugged in and whether the fan of the power supply is rotating. Are the power indicators and hard disk indicators flashing on the host panel?

Because if the host power supply is not working or the motherboard is not powered, the display will not have an image display when it does not receive a signal.

2.Check again that the power supply to the monitor is plugged in well? If your monitor's power switch is a tact switch, you should hear a slight sound when you power up the monitor"Crackling"sound, at this time, it can be judged that the switching power supply circuit of the display is good.

Is the power switch on the remonitor turned on? Is the monitor's power indicator on? When approaching the monitor screen with your hand and slowly move it to see if there is"Sizzle"At the same time, the hairs on the hands have the feeling of being sucked up, which is checking whether the display high voltage circuit is working properly.

3.If you are sure that the monitor has been powered on and there is a high voltage generated, continue to check whether the data cable connector of the monitor is in good contact with the signal output interface of the graphics card. Is there any looseness?

Unplug the plug again and check if there are any bent or broken needles or a lot of dirt in the D-connector. This is a problem that many users often encounter, when connecting the D-type socket, the force is uneven, or forgetting to tighten the fixing screw of the interface, so that the interface is loose and causes poor contact, or due to improper installation method or excessive force, there are broken needles or bent needles in the D-type interface, resulting in poor contact.

What's going on with the black screen of the TV, don't panic, listen to the professional analysis of what the cause is.

First, the backlight plate problem.

The power of the TV is turned on normally, and the indicator light is flashing, but the TV has a black screen, then the backlight plate of the TV will not light up, that is, the high-voltage board is faulty. The reason for this is simple, it is that the fuse is burned or there is a problem with the switch chip.

Solution: Buy a new insurance to replace it, of course, if there is a problem with the switch chip, then you need to find a professional maintenance personnel to overhaul the chip.

Second, the power supply problem.

At this time, you need to check carefully to see if the TV's residual source circuit is faulty,Normally,The panel buttons will not respond,And the TV indicator is not on。 At this time, you need to use the meter to detect whether the voltage of the power supply is too low, and at the same time, you should also detect the input problem of the power supply circuit, and check whether the voltage of 12V has been converted to 5V voltage, because this is also the more common reason for the black screen of the TV.

Solution: Install a voltage regulator to ensure that the voltage of the TV is stable. Of course, if the power supply circuit fails, the input of the power supply circuit needs to be adjusted to ensure that the input voltage of the TV is normal.

3. Component failure.

In addition, there is another very important reason for the black screen of the TV, that is, the failure of the TV components, such as: the high-voltage inverter or the control transistor is caused by air welding.

Solution: At this time, it is necessary to eliminate the components with the problem of damage one by one, and replace the faulty components, so that the voltage can be restored to normal. This kind of failure is not uncommon, usually when the fuse is burned or the regulator chip fails, and we only need to replace the relevant parts.

The main reasons are:

1. If the power indicator of the TV is off, it may be that there is a problem with the power connection of the TV, resulting in a sudden power failure and a black screen, such as a power outage at home, a loose power plug, a power cord failure, etc., you can check the problem one by one and deal with it accordingly.

2. If the TV power indicator is on, it may be that the user has mistakenly pressed the standby button of the remote control, which makes the TV enter the standby state, so the black screen is displayed; At this time, the user only needs to press the standby button of the remote control to wake up the TV and resume the normal screen display.

3. If the TV screen is still black after the above methods are checked, it may be caused by hardware failure, such as power module failure, short circuit or open circuit of switching circuit, high-voltage board failure, LCD screen or screen cable failure, motherboard chip or other component failure, etc., you need to contact the after-sales service of the TV to overhaul the TV machine to solve it.

1) The black screen of the TV may be that we have used our TV for a long time so that the system collapses,This kind of situation is not repaired under the condition of careful rolling,Because at this time, the electric width is silently permanent,It is recommended to buy a new one。 (2) This usually happens to my TV at home, and at this time I will turn off the TV and restart it.

Mistakenly press the standby button of the remote control,Let the TV turn to standby state,Therefore, a black screen appears,At this time, you only need to press the standby button in the remote control again,You can restore the TV crack to normal。

If the TV is still black after the above methods are checked, it may be caused by hardware failure, such as power module failure, short circuit or open circuit of limb switch circuit, high-voltage board failure, LCD screen or screen cable failure,

The computer often has a black screen, four common hardware problems, the first is memory failure, the second is the single hail segment of the graphics card, the third is the motherboard failure problem, and the fourth is the power supply problem.

It is also possible for the processor to cause the computer to go black, but the probability is very low. It is also possible that the display will malfunction and cause a black screen, but the probability is also very low.

Then there are the following situations that may lead to the seepage of the black screen of the TV:

First, the TV itself is faulty, and second, the set-top box is faulty.

Hello! 1. There is a problem with the TV power supply, such as: power outage at home, loose power plug high, power cord failure lamp, at this time you need to check one by one, only find the problem, can you take corresponding treatment.

2. Mistakenly press the standby button of the remote control.

The reasons for the old black screen of the computer to watch the TV series of the confession banquet are generally as follows: 1. The failure of the display causes the failure of the screen to work normally, resulting in a black screen, first check whether the power cord of the monitor is there.

This fault is manifested as no image, which is generally divided into two situations: one is that there is no image, there is sound, and the TV screen is not bright. The other is that there is no image, no sound, and the TV screen is bright.

Most of these cases are short circuits or open circuits. 1. These two conditions are the most common black screens.

Phenomenon, the black screen of the TV may be caused by the abnormal power supply circuit, and you need to check whether the voltage is normal first. Check the current again, the voltage and current are abnormal, and 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. Check whether the voltage and current inside the TV are stable and normal, if there is no voltage and current, it is a line problem. You need to look further at the power supply. 3. The power module of the TV.

Fault, no power supply, or unstable power supply will cause the TV to black screen, check whether the power supply is normal, if the power supply is normal, see if the circuit connection is not in good contact. 4. The high-voltage board failure of the TV, the failure of the imitation LCD screen or screen cable, the failure of the motherboard chip or other components, etc. 5. The TV switch circuit is short-circuited or open-circuited.

The damage of the TV switch also leads to the black screen of the TV, turn on the TV switch to see if there is a series of problems such as component damage and switch failure, and the switch should be repaired.

1、The reason for the sound of the black screen of the TV may be caused by the abnormal power circuit of the TV,The phenomenon of this problem is that the panel buttons do not have any response,The indicator light is not lit。 When encountering such a problem, you should first check whether the 12V voltage and 5V voltage of the TV are normal. If the voltage is normal, it may be that there is a problem with the number of stages of the input power supply circuit, which is generally due to the fact that the fuse of the power supply is burned or there is a problem with the voltage regulator chip, and the fuse of the TV is burned and the fuse of the TV needs to be replaced;

2. The load of the 5V voltage of the power supply is too heavy, and the voltage is too low, or there is a problem with the signal processor of the rear stage, and some circuits are damaged. At this time, it is necessary to eliminate the problematic components one by one, check the problematic components, replace the faulty components, and the voltage can be restored to normal. When replacement, it is necessary to go to a professional maintenance point to find a maintenance personnel specializing in Hu Yeye;

3. The power supply of the TV is normal, which may be due to a problem with the backlight circuit of the TV, which causes the TV to have a black screen and sound. At this time, you need to connect the display to the host for boot check,When you are close to the screen, you can find that the screen shows a very dark image,This can prove that the signal processing part of the driver board is normal,Then the reason for the problem of the TV is that the function circuit of the high-voltage control board switch that drives the backlight is faulty,As long as the troubleshooting of the function circuit can restore the picture of the TV;

4. The situation that the TV has a black screen and sound may also be because the backlight of the TV screen is broken, and the backlight of the TV is broken, which will also lead to the black screen of the TV, the reason for this problem is different from the reason why the black screen of the TV has sound in the previous increase, at this time, due to the load imbalance protection of the high-voltage plate, the backlight of the TV pants will be broken and the high-voltage board of the TV will enter the state of load unbalanced protection, and the backlight of the TV needs to be replaced at this time. troubleshooting;

Well, if the TV screen is often black, there should be a problem with the original of the picture tube.

1) The black screen of the TV may be that we have used our TV for a long time so that the system collapses, in this case, it is not repaired, because the TV is permanent at this time, it is recommended to buy a new one.

Limb finger (2) This is usually the case with my TV, and at this time I will turn off the TV and start it again. This is usually the fastest way, but it's a bit damaging to the TV this way.

3) There is also a possibility,There is a problem with the computer power supply,The input power supply and the output power supply are inconsistent,Resulting in poor TV connection,It is recommended to change the plug again。

4) If the screen on the back is broken, it may be that the TV screen deteriorates under that kind of heavy blow, you can go to a special place to repair the TV, and let the master help you change the screen.

This kind of TV series that often has a black screen,It means that there is a problem with the TV itself,Our solution now is just to extend its lifespan,It's not certain to fix it completely.,It's just a solution.。

The main reasons are:

1.If the power indicator of the TV is off, it may be that there is a problem with the power connection of the TV, resulting in a sudden power failure and a black screen, such as a power outage at home, a loose power plug, a power cord failure, etc., you can start to check and find out the problem one by one and deal with it accordingly.

2.If the power indicator of the TV is on, it may be that the user has mistakenly pressed the standby button of the remote control, which makes the TV enter the standby state, so the black screen is displayed; At this time, the user only needs to press the standby of the remote control again.

3.If the TV screen is still black after the above methods are checked, it may be caused by hardware failure, such as power module failure and switch circuit.

1、TV power supply is equipped with old questions,For example, power outage at home,Loose power plug,Power cord failure lamp,At this time,You need to check one by one,Only if you find the problem of Zhixiang,You can take corresponding treatment。

2、Press the standby button of the remote control by mistake,Let the TV turn to the standby state,Therefore, the rental has a black screen and the first rent,At this time, you only need to press the standby button of the remote control again,You can restore the TV to normal。

3、If the difference is discharged by these two methods,The TV is still empty and the screen is black,This may be caused by hardware problems,At this time, you should contact the after-sales personnel of the TV for testing。