What to do if the monitor doesn’t turn on
Often the problem is not with the display, but with your computer. Check each option and solve the problem yourself.
Before proceeding with further diagnosis you need to make sure that the monitor is receiving power. This is indicated by a LED on the front panel, which should be lit or flashing in one of the colors.
If it’s not on check the power button on the monitor and extension cord which could have been accidentally pressed by someone or yourself when you were cleaning and you didn’t notice it.
If it’s okay there, it might be the cable. On the plug side it plugs into the socket pretty neatly and securely, but the monitor’s power connector just plugs in. The wire may have shifted slightly in the socket and the contact is broken.
Try plugging it in a little more and check the indicators. Trouble can also be with the cable itself. To rule them out, replace the wire with another one, e.g. from a computer power supply. they fit (unless it is a model with an external adapter).
Boot Windows in Safe Mode
Initially you should try to boot the system safely.
Disconnect external devices from the computer, as well as flash drives, which could also be the cause of the conflict.
Shut down your computer to stop any processes that are causing the black screen.
Then restart the system, and make sure that you press the F8 key (Delete, Shift F8. depending on the installed operating system) at the beginning of the boot process.
In the boot options window select the necessary option.
In this case you should try to boot the system using the Safe Mode.
If the computer starts in this mode without much trouble. then you can assume a failure of the system settings themselves.
This additionally includes the appearance of an error after another update in the registry of the OS, and improper operation of drivers.
Here the activation of the operating system is the first step to fix the problem.
Many people use an unlicensed copy of the operating system, the next update of which sometimes ends up with a black screen.
It is because of the impossibility of passing the “pirate copy” identification on the site of Microsoft Corporation.
If so, after booting into safe mode you will see a screen warning about using an unofficial version, which must be licensed.
Activate your copy of the operating system to eliminate the problem.
The black screen may be caused by the hardware problem.
For example, due to bad contact between the monitor and the system unit, when there is no signal from the video card.
The monitor’s network cable is not properly connected to the outlet
In this case, check the quality of all connections, and check the external damage to the screen, because of which the image may be absent.
If such a problem occurs on a laptop, the cause is almost always not related to the display, because in order to damage it, it must be subjected to a strong mechanical impact, such as a fall or a blow.
In this case the monitor deformation will be visible to the naked eye: there will be color stripes, areas with dead pixels, scratches, etc.п.
On a computer, a black screen when logging in can cause a failure of one of the components of the system unit, so it will need to be examined in detail.
First of all, you should pay attention to the video card, namely, the reliability and tightness of its mounting in the motherboard slot, as well as the stability of the supplied voltage and cooling (if it is not passive).
Another option. Restart the PC in Safe Mode.
Press and hold down the Power button to shut down the PC and then restart it. As soon as it starts to load, click F8 and wait until the recovery screen appears.
Choose one of the offered variants of booting and wait till the process is over. If the image returned, most likely the problem lies in the video card drivers. So make sure you update your Windows system without procrastination. How to do this, we will tell in our article below.
The black screen when you start the computer
Sometimes you may encounter a very strange phenomenon. you turn on your computer and Windows does not start, instead you get a black screen. As a rule, it displays a list of possible ways to boot from which you should choose something.
Appearance of the black screen is a direct sign of errors in the system that can extremely negatively affect the computer. But do not panic and install the new system immediately. Most of the time such a fault can be solved independently, without spending a lot of effort and money. So in this article, we just talk about what you can do if there is a black screen during the boot of Windows 7, how to get rid of it?
The reasons for the black screen when you boot Windows?
To begin with, let’s get a better understanding of the situation. Which can lead to a black screen when you turn on your computer? Causes can be very different. But one of the common ones is incorrectly shutting down the PC. This can lead to all kinds of software errors and problems in the system and they, in some cases, may cause this screen the next time you turn on your computer.
It may not even be the fault of the user who was using the computer. One sudden power outage, at a good time, you get a black screen).
The computer is infected with a virus
Do not forget about such a sworn enemy of each user, such as computer viruses. Some of them can seriously interfere with the system and lead to various errors. Therefore, try to use reliable anti-virus tools, do not be lazy to regularly perform a full scan of your computer for viruses.
Contacts are loose
If your PC starts up normally and you hear one, short beep in the system box which tells you that the computer has successfully turned on and is relatively working, but the monitor itself shows nothing, then you should check the monitor itself and its connection.
Make sure that its cable is securely connected to the system unit. Often when you move a computer, for instance to another room, you might not connect the components securely enough. Check the cable for damage. Try to turn on the monitor without connecting it to the computer, if it shows signs of life and the message that there is no signal, then the problem is not in the monitor at all.
Your monitor is working properly and displaying different information on the screen? So let’s move on, consider the case when, after you turn on your computer, Windows does not boot, but instead appears a black screen of different boot options.
System or Software Failure
Such a black screen already indicates a problem with the operating system. If you look carefully, we will see a list of different boot options, from which you need to choose the appropriate option. First make sure that the system is able to boot in safe mode. After you turn on your computer, press the F8 button from time to time, this will open a menu with more options for booting. Next, use the arrow keys on your keyboard to highlight the “Safe Mode” option and press “Enter”.
The safe mode is a very useful thing! It can help you in many situations when you have problems with your system. It can be especially useful in case of infection with malicious programs that can interfere with normal operation of the system. In this mode you can start the computer and solve many problems.
There are several different options, by selecting which you can run different types of safe mode.
The first option is simply “Safe mode”. this is the most frequently used option. Here you will run a minimum number of applications and services. But in this mode there is no access to the network and Internet.
The next item on the list is “Safe Mode with Network Drivers Load”, but here we are allowed to use the Internet.
There is also a “Command line driven safe mode”. here you can use different commands to control the system. This item is often preferred by administrators.
So, you have chosen the desired mode and boot from it. If the desktop appears safely, then there is a chance that this screen has appeared due to some failure among the programs. If some program has been installed recently and the above mentioned screen appears the next time you start the system, it might be the problem. Here the best solution would be just to remove such program or driver, in order to eliminate such error.
When you have booted into the right mode, I highly recommend to perform a full scan of your computer for viruses, using antivirus utilities. Check your registry for dangerous and malicious codes. In many previous articles it has been discussed how to conduct such checks.
Nothing appears on the desktop
Sometimes you have faced the fact that you really have detected harmful programs and different viruses on your computer, after which you have successfully deleted them. The black screen has stopped appearing, but here’s the trouble. now nothing is displayed on the desktop. Nothing at all, no shortcuts or even the Start bar. But you can fix it here too, just follow the steps below.
- At the same time press the following key combination “CtrlShiftEsc”. Task Manager window will be opened and you should go to the first tab, as it is shown on the picture below. Then click on “New Task”. Then in a new window enter the following command “regedit”.
In this directory, look for the parameter named “Shell”. It should have only one value, like this: “explorer.exe”. If you find other values there, you will have to delete them and save the parameter with the value you have just mentioned.
Locking the system and the task manager
Sometimes rather unpleasant problem happens, when Task Manager is locked and can not be opened, and safe mode does not start. But you can easily fix it here, too.
There is such a tricky thing as the “Shift key stuck”. If you press the Shift key five times in a row, at short intervals, a window will open.
In order to find out what exactly caused the malfunction of your computer you need to disconnect the devices which can cause the malfunction one by one and then see, whether the PC will run without them.
The first thing to try is to turn on the computer with a different monitor, as well as with a different cable with which the display is connected.
Disconnect the cable from the corresponding video card connector on the PC.
If you see a picture after that, then everything is OK and it was these PC items.
Then disconnect all the devices connected to your PC via USB. These are mice, keyboards, flash cards, webcams and so on. Often, these devices fail and begin to supply high voltage to the motherboard USB-connector or change their resistance, which eventually leads to the fact that the PC starts, but the image on the monitor does not give. If disconnecting one of the devices has helped and the PC works normally, it is necessary to replace it with a similar one.
Unscrew the screws which are used to fasten the side cover and remove it.
If after these manipulations a picture appeared on the screen, then it was the video card.
Important! However, you should remember that not all motherboards have a video output. It is provided only on those of them that are compatible with processors with video core. All Intel models have it (except for server versions), but not all AMD processors have integrated graphics and there is no video output on their motherboards. You need to take this factor into account when checking the performance of your PC in this way.
Frequently the cause of no picture on the monitor is a problem with the RAM. You will need to check if this is the case:
Remove PC side cover by unscrewing appropriate screws.
If the cause is memory, the computer will start and display an image on the monitor. However, this does not mean that the RAM card is completely defective. Quite often it prevents your PC from normal operation due to the oxidation of contacts. When this happens, the electric current cannot flow through it normally, causing the entire system to malfunction. To remove the oxide you need to wipe the memory contacts with an eraser. This can help in many cases.
You can also try moving the memory stick to the next slot. This also sometimes fixes the problem.
The motherboard may also cause a problem. Unfortunately, at home to understand whether it is broken or not, it is quite difficult. However you can try to do this:
Remove the side cover, previously unscrewing the bolts.
If the motherboard is found, you must either take it to a service center, or replace it with another one. If you do not find external signs of failure, and turning off other devices did not yield results, the system unit is better to show a master.
Problems with the software
In some cases, the “black screen” is caused by problems with the software. This can occur when replacing components. For example if you have Windows 7 and put a motherboard with AM4 socket and corresponding processor on your PC, without re-installing the operating system you will see the following picture.
How to rollback the system to a working state
It is worth knowing that the operating system provides for the creation of checkpoints. If a user decides to do an update, whether it’s installing a new driver or t.д., but has achieved the wrong result, then he has no problem to return everything back, because the system has created a copy before his actions. It is worth examining the system rollback on the example of Windows 7:
In the lower left corner locate the “Start” button, in the search field write “Restore”. The system will give a prompt “System Restore”, this is the application and should be clicked on.
These actions will not only help to get rid of the black screen. After them the user can forget about viruses, if they have appeared recently.
Updating a video driver
Even after the operating system recovery procedure, it is advisable to perform a full analysis for the presence of “malware” in it, which corrupts the OS files again. If the OS still does not start at all, you should remove the hard drive from the problem PC and connect it to a working computer to check for viruses. You can use “Dr Web CureIt”. In it you need to select the connected hard drive and start the analysis by clicking “Run check”.
In this article we discussed the most common causes of black screen on personal computers. Many of them can be solved independently, without resorting to the help of specialists. In particular, it is a wrong shutdown of the computer, which caused incorrect booting, as well as system infection with viruses. It is enough to boot in a “safe mode” and solve the black screen problem.
Especially for this, we have listed all possible actions for cleaning malware. You only need to carefully read the above instructions and follow the instructions exactly. In cases of difficulties it is recommended to refer to a specialized computer forum and discuss the problem with experienced users, competent in this matter.
However, if the black screen is due to internal computer problems (defective parts, damaged tracks or mechanical impact), it is better to take the system unit to a repair shop and get qualified help. The wizard will carry out a comprehensive diagnosis of the motherboard and eliminate the problems. If the computer is under warranty, then you can take advantage of this service for free.