Vacuuming the computer and the monitor does not turn on
Is the monitor working?
Power off the computer and dual monitors. Disconnect the first one and reconnect the second one instead. If you use the same cables to connect both screens, then try again through it.
If the computer does not see the second monitor connected via HDMI, try connecting via a patch cord to a different connector (DVI, VGA). Still no? Connect the display to another PC or laptop. If it does not work, it is likely that the monitor itself is not working properly.
Laptop or computer can’t see second monitor via HDMI
Connecting a second monitor to a computer is not a luxury, but a practical task. The second monitor can be any display that has an HDMI, VGA, DVI, Display Port, Thunderbolt, or USB-C port for connection. But sometimes a computer running Windows 10 after connecting does not see the second monitor. There are many reasons for this, so we will focus on each separately.
If in the course of reading you have questions, or want to add something, feel free to write in the comments. On questions. we will answer, additions. we will add.
How to connect two monitors to a PC is described in the following
How to connect to PC?
It is important to connect two monitors to the same video card. If one is connected to an external video card, and the second to an integrated one, this method will not work without special settings and support for the corresponding mode of the motherboard.
Additionally, make sure the connector is securely fastened to the monitor port and PC port. If connecting with a VGA or DVI cable, make sure that the connector is firmly seated in the connector, and that the latches are screwed in so that you cannot loosen.
If you connect a modern display via USB-C, you need the cable to support media signal transmission. This can be found in the specifications for this patch cord. The computer must also support USB-C video transmission technology. Using ordinary USB-3.0 to USB-C adapters, the screen will not display a picture.
Check the ports of the video card with a work monitor and patch cord. Check the connector pins so they are not bent. Visually inspect the connectors on both the video card and the computer. Make sure the cable is completely intact.
Are you using an adapter?
There are quality adapters and cheap Chinese. If for the use of the former there are still disputes about possible losses and the quality of image transmission, then the latter may simply refuse to work. If the conversion from digital to analogue signal, the cable must be equipped with a converter.
Also, the video card must support digital-to-analog conversion.
Does the external card support dual monitors?
Older or cheaper graphics cards may not support parallel operation of two or more concurrent monitors. For many video cards, support for three displays becomes a problem.
There are also cases that displays can work if they are connected only via digital HDMI, or only via analog VGA ports. Simultaneous connection to different outputs was unsuccessful.
What to check?
Let’s go from the easiest thing that can be done inadvertently. And let’s get to the identification of possible breakdowns, in particular.
Here you will find instructions on how to connect an additional screen to a laptop via HDMI.
Is the monitor itself turned on?
It’s trite, but maybe the monitor is not turned on in fact? Check the power (plug in socket), power button on the front panel. Some models have a power on / off button (toggle) at the back, so check that too. A lit or blinking LED on the front panel will indicate that the display is on.
Also, pay attention to whether the power cable is firmly inserted into the power connector for the display. It shouldn’t have any damage.
What to do first?
What if the second monitor connected via HDMI or another port does not work? Most likely, you made the physical connection between the PC and the display correctly, the devices are in working order, but Windows 10 was unable to initially detect the display. Follow a couple of simple tips:
- Restart the computer after connecting (especially if the devices were connected turned on, which is not recommended).
- Click WinI and go to “System”. “Display”.
- In the “Multiple Displays” section, click the “Detect” button.
- If in the same item two displays are displayed or started to be displayed, and the first one is set to the “Show only 1” mode, select the “Duplicate” or “Expand” mode so that the picture also appears on the second screen.
- You can check the driver on the display. Right click on Start and open “Device Manager”. In the “Monitors” section. remove the device for the second and then update the configuration.
- Check if the connected second screen is visible using the graphics card software. If you have a video card from NVIDIA. NVIDIA software control panel, for Intel. Intel Graphics Control Center, for AMD. AMD Catalyst. In the section about monitors, you can check the presence of a second one and configure it there.
- If the connected display does not see the software of the video card to which it is connected, the connection may have been made incorrectly or there is a malfunction in one of the elements. Although unlikely, you can still check the drivers for the video card.
- To do this, update to the latest version using proprietary utilities (for example, NVidia GeForce Experience). Or use Device Manager to remove old and install drivers from Microsoft database.
Next, we will analyze the most popular cases that have not been described in this section.
I also advise you to watch the video about working with multiple monitors in Windows 10:
After replacing the video card, the monitor does not turn on
You replaced the video card, in anticipation of a better image, you turn on the computer, but after your manipulations, the monitor that was still working does not turn on. Unpleasant situation. She is often found. There are several reasons for such a malfunction, and you can fix many of them yourself. Let’s figure out how to find and fix problems.
Video card incompatibility
Let’s define compatibility. In the last 15 years, this problem in its usual form (whether the ports of the motherboard and the video card fit together) has practically been removed: all video cards are produced for the PCI-E connector. Incompatibilities may arise if you purchased used equipment older than 2004. However, now another subtle place has arisen. nutrition. In its connection, different models have their own nuances, and in addition, modern devices are extremely sensitive to the power of the power supply.
On the Internet, there is a version that the malfunction may be related to the version of Windows. But the incompatibility of video card drivers with Windows 10 for most models has been resolved, and if this is not the case, the problem looks different. The image appears on the display, it is possible to enter the BIOS, and when the OS boots, a message appears that the video card driver is not supported by the system. In this case, you will have to replace either the card or the OS.
Incorrectly installed video card
After the introduction of the PCI-E connector standard, which happened in 2004, it is impossible to install a video card incorrectly. It is installed in only one way. All possibilities of incorrect installation of modern devices are limited by errors when connecting the power supply and insufficiently tight installation of the board into the port.
Video cards released before 2004 have not had wide practical use for a long time. The integrated solutions of modern motherboards are much more powerful than the external devices of yesteryear.
If the monitor itself is working properly (this is checked by connecting it to another computer), then there is a problem in the system unit or between these two devices. Often this is:
- malfunctions in the video card (defect, unfortunately, still occurs);
- lack of voltage;
- contacts are broken: the card is poorly fixed, the cable is broken, the port is loose.
In such cases, the computer boots up, the lights are on, the fans are spinning, the hard drive is noisy, but there is no image on the monitor.
What to do if the monitor does not turn on due to the video card
- after turning off the computer, check the cable between the system unit and the monitor. this is the first most frequent problem in such cases, it may not be fully inserted and you cannot visually determine it;
- inspect the card: is it well seated in its slot, is it secured with screws, is it loose;
- check the cables connecting the motherboard and the video card.
Attention! If the system unit is under warranty, then without prejudice to yourself, you can only check the cable between the monitor and the system unit and the monitor power cable (they can be combined into one cord). You cannot open the case to inspect the video card, you will lose your warranty.
If the situation does not change when you turn on the computer, check that the power is connected correctly.
Open the instructions for the video card or find it on the Internet, compare the power consumption of the new and old devices and evaluate the capabilities of the power supply. By the way, it does not always give out the declared voltage, the Chinese often exaggerate the capabilities of this device.
Another subtlety: some video cards require two power cables to be connected. If you connect such a device with one cable, it will not work.
Is the power connected according to the instructions, but the monitor does not work? Check the cables themselves, sometimes the breakdown lies in them. Pay special attention to the ports, they should not wobble. Replace cables if possible and test the computer again.
In a situation where the case is not guaranteed (the hardware was bought second-hand or from hands, there are traces of mechanical damage on the board, etc.), try contacting a workshop. It is important to remember that in this case, no one can promise the reliability of the device. The option with a workshop is also suitable if you are confident in the video card, but there are doubts about the compliance of the power supply to the declared power.
Replacing a video card in a system unit is a simple operation that an ordinary user can do. It is almost impossible to spoil something in the process, if you do not apply excessive efforts to the electronics. But choosing a device that will work in your system unit and perform the necessary tasks is a little more difficult. To avoid wasting time, check the capabilities of the power supply before purchasing, and, if necessary, replace both components at once.
Why won’t my computer wake up from standby?
Greetings to all readers. Recently, there have been quite frequent questions about the fact that the computer does not return to a working state after the standby mode.
The computer hums, the coolers are spinning and the monitor does not turn on, only the indicator is blinking.
over, people are frightened by this behavior of the computer. Immediately, the thought appears “did something wrong or broke”.
In fact, in most cases, the problem is software (drivers or Windows), although hardware malfunctions of the computer (cable, video card) are not excluded.
In this article I will try to consider all possible causes and solutions to this problem.
2.1 How to disable standby?
To go to the standby mode settings, go to the control panel. power supply. Click on the link “setting the power supply scheme opposite the active circuit”.
You will see the settings for turning off the display and switching to standby mode. First, try to select the “display off” setting and select from the list. never.
If this does not help, then simply turn off the standby mode. To do this, select in the settings “Put the computer to sleep”. never.
Also try using hibernation instead of sleep mode. To do this, go through the control panel to the power settings again.
Next, follow the link on the left. the actions of the power buttons.
Next, make the settings so that when you turn off or press the sleep button, the computer goes into hibernation. By the way, cool trick.
In general, you can set everything as I have in the screenshot below and click save.
The settings were carried out using the example of Windows 8. In Windows 7 and XP they are very similar, so I think there will be no problems with this. But if something doesn’t work out. ask in the comments.
to the menu
1 Exit standby
If, after the standby mode, the computer behaves as described above, then proceed in the following sequence:
- First, check that the monitor is turned on. Usually, the indicator flashes in this case. If the computer does not respond to mouse and keyboard clicks, press the Power button on the system unit.
- If the monitor does not turn on, the indicator blinks, but you can hear how the system unit works, then hold down the Power button for 10-15 seconds until the computer turns off.
- Then turn on the computer again with the Power button. The computer usually turns on after that because standby is cleared when the power is turned off.
- If the monitor does not turn on again, then, if possible, check if your monitor works on another PC, laptop or tablet (most likely it will work).
As most often happens. there is no other computer at hand and the monitor still does not respond. In this case, you will have to dig in the direction of hardware faults.
First, try replacing the cable connecting the monitor to the video card. If there is still no reaction, then it is better to take the computer to a service center for diagnostics.
It is better to take the entire computer, because if you remove and bring one video card for diagnostics, then something is rarely found.
As I said above, hardware problems are less common, most often the situation is repeated from time to time when the monitor does not turn on until you restart or forcibly turn off the computer with the Power button pressed.
to the menu
2 What can be done to prevent this from happening again?
Try updating your graphics card drivers to more recent ones. It is possible that the standby mode does not work correctly in your version of the drivers.
Note: Drivers of some devices may not support operation after hibernation (in Windows XP, standby mode). For example speakers, mouse or keyboard.
In this case, disconnect and reconnect the device. Also update the drivers if possible. Read more about this in this article.
If it does not help, then it may be worth setting up the standby mode. on this below.
to the menu
2.2 In a nutshell about the differences between hibernation and sleep mode
In sleep mode (it works by default), the computer goes into a low power consumption mode, in case you need to be away for a short time and then resume working at the computer.
In this case, work in programs will remain in the same form and they will be open.
- In the event of a power outage, all data will be lost and nothing will be saved.
- Sometimes problems arise when the monitor does not turn on and the indicator blinks (the article is devoted to this topic).
Hibernation mode allows us to save all our data in RAM to the hard disk and return to the previous working mode after turning off the computer.
In simple words, we turn off the computer without closing programs and without saving anything. After turning on, the computer boots in the same state as it was (with open programs, etc.).
The computer boots up much faster (because of this, I use this mode all the time).
All data is retained when power off.
Usually, in this mode, there are no problems as with sleep mode (when the monitor does not turn on, etc.).
In general, it is up to you to decide which of this to use, but just for experience and possibly simplification of working at the computer, I recommend trying hibernation mode.
Why the monitor won’t turn on and what to do?
Once you turn on your computer, and everything seems to be fine, the system unit is running, but the monitor screen does not work. What to do in this situation and how to solve the problem. we will tell you in our article.
To begin with, it is worth saying a few words about diagnostics. It is very important in this case to determine the nature of the problem. If, when the computer is turned on, the monitor does not react in any way, then this means that a signal from the computer is not received by it, but if the monitor responds to turning on the computer, the indicator shows a connection with it, then the problem is either in the video card or with the monitor itself. If the system itself does not boot, and the BIOS does not load on the monitor either, then the reason is in the operation of the computer itself.
After such an analysis, proceed to finding the reasons for the absence of an image on the monitor and solving this problem.
Why does the monitor not work??
Connecting cable is incorrectly or poorly connected
The second most common reason why the computer monitor does not turn on is an incorrectly connected connecting cable between the monitor and the system unit. Check that the cable is connected to that connector, since if you have an integrated video card, and with it a discrete one, then the cable from the monitor must be connected to the discrete one, it is usually located below.
Along with this, we also recommend checking the correctness of the connection to the connector itself, for this, remove and re-insert the connection cable, both in the system unit and in the monitor itself. There is a possibility that the connecting cable may be damaged, so try connecting the monitor to the computer with a different cable.
The reason why the monitor does not work on the computer is a failure in the image settings. This may be due to the incorrectly set monitor resolution, frequency, and other settings. To do this, connect the monitor to a different connector, or enter through safe mode and reset the monitor settings.
If you have 2 video cards, make sure that the integrated video card is disabled in the BIOS settings.
Problems with the graphics card driver
Drivers can also cause a problem with the absence of an image on the monitor. If you previously uninstalled the driver or installed a new one, or updated it, as a result of this, the video card may start to work incorrectly, including the absence of an image on the monitor. To do this, go to the system through safe mode and completely remove the old video card driver and install a new one.
Graphics card problems
The problem with the video card can arise not only because of the drivers. For example, if you previously cleaned the system unit, then it is possible that you touched the video card, and if you removed it, you inserted it incorrectly. To do this, turn off the computer, remove the video card and reinsert it.
If the problem is not solved, or before that you did not conduct any robots in the system unit, then try connecting the card to another connector on the motherboard, and if there is an integrated one, connect the monitor to it, having previously pulled out the discrete card to check the monitor itself. It is possible that there was a breakdown of the video card itself.
We also recommend checking the settings of the monitor itself. In particular, make sure that the used cable connection type (VGA, DVI or HDMI) is selected in the settings. Also wander through the other settings.
It may be that the monitor itself has broken, this also occurs. In this case, you should not be very upset, because if the monitor does not turn on, then this is not as bad as in the case of problems with the screen matrix.
In the case when the monitor displays only the BIOS loading, and then does not turn on, while the operating system startup sound is played, then the problem with the monitor may lie in the system itself. There may be an error or there may be a problem with the system files. If before that you installed any programs that change the visual style, then because of this, such a conflict may occur. Viruses that block the operation of the operating system itself, as well as the operation of drivers and devices, can also lead to such a problem.
When the monitor displays the BIOS loading, but after that a black screen appears, and there is no OS startup sound, then reinstall the system.
If the monitor does not work even after all the actions performed, then try connecting it to a laptop or video player to check its functionality. If the monitor works when connected to a video player and does not turn on when using a computer. then the problem is in the video card or in other components of the computer. If, when connected to another device, the monitor does not work, take it for repair. You can also try to connect another monitor to a computer or a modern TV, if the image is. the problem is in your monitor, if not, then look for the problem in the computer components.
We wish you success in solving this problem, and if you did not succeed in solving it, then our specialists will help you with this.
The monitor does not turn on because it is broken
Problem. If the monitor stopped turning on completely unexpectedly, and you have already checked all the previous methods, then it may have broken itself. Maybe burned out from a power surge, or maybe some other reason for inoperability. In any case, the broken monitor does not display an image, and you need to fix it.
Decision. It is quite difficult to carry out self-diagnosis of the monitor in order to determine a specific malfunction for its further elimination, especially for an ordinary user who does not understand electronics. If you are guaranteed to make sure that the monitor does not turn on because it itself is broken, you need to contact a specialist. How to find out exactly that the problem is in the monitor itself, we recall below.
How to make sure that the monitor is broken:
- Checking / replacing the power cable
- Checking / replacing the connecting cable
- We connect the monitor to a TV, DVD player or laptop
Incorrect connection of the connecting cable
Problem. The second most common reason, which serves as an answer to the question why the monitor does not turn on, is user error when connecting the monitor to a PC cable. If the cable is connected to the wrong connector or the quality of the connection is poor, you will not get a picture on the monitor.
Decision. Check that you have connected the cable to the correct port (especially important for those users who have two video cards on their computer: discrete and built-in). The monitor must be connected to a discrete video card, its connector, as a rule, is located slightly below.
In addition, you need to check the quality of the connection. To do this, you need to remove the cable, clean the connector from dust and debris and reconnect. In addition, there is a possibility of breakage of the cable itself, so if you have the opportunity, try using a different cable to connect.
Monitor won’t turn on due to settings problem
Problem. Incorrect monitor settings can be a real cause of inoperability. For example, a user sets a screen resolution or refresh rate that is not supported by the device. On some monitors, unsupported settings will be reset automatically, on some this problem will become a real headache, as the device will refuse to turn on.
Decision. Fortunately, this problem is also solvable. If the settings are incorrect, you need to start the computer in safe mode and reset the monitor settings, or restore the system. How to start a computer in safe mode on Windows 8, Windows 7 and XP, we have already told.
After starting safe mode, go to the “Start” menu and set “System Restore”.
We start the recovery process and follow all the instructions.
The monitor does not turn on due to lack of power
Problem. A very common cause of a non-working monitor is an unconnected power cable. Yes, the reason is very common, but you can be sure it is very common. An unplugged power cord can be easily overlooked, especially in a rush or rush. Someone can accidentally touch the cable plug, and it will move away from the outlet, or for the same reason, the cable will move away from the monitor. The monitor will not work without power, it is clear to everyone.
Decision. Fortunately, this problem is easily fixed. If the monitor is receiving power, a small blue, yellow, green, or red light (depending on model) should be on. If the light is off, be sure to check the power cable. Remove the plug from the socket, make sure there is no debris and plug it back in. Also, disconnect the cable from the monitor and reconnect, after checking the connector for foreign debris.
If there are no questions about the connection quality, you can try using a different power cable. It is possible that the old one is simply damaged. If the light comes on and the monitor is working, good, you can safely continue using the computer. If the light comes on, but the monitor is still faulty, the situation is bad, as well as if the light does not light up at all. If the problem persists, read on.
Video card driver problems
Problem. A malfunctioning driver can cause the monitor to stop working. Graphics driver problems may start after unsuccessful update or uninstallation.
Decision. To solve the problem, start the PC in safe mode. Read how to do this above. Next, you need to roll back the faulty driver. Go to the device manager and click on the properties of the video adapter.
Go to the “Driver” tab and click on the “Rollback” button.
If there is no rollback option, then click on “Delete”. In this case, the problem with the monitor should be resolved and it will start, the picture will be of poor quality, and the resolution will not be optimal. When the computer turns on, just install the latest driver for your video card.
Alternatively, you can use Display Driver Uninstaller, which can completely remove the video driver from your system.
Defective graphics card
Problem. There is a possibility that your monitor is working properly, and the problem with displaying the image is related to the video card. It may be poorly connected or, in the worst case, it may burn out.
Decision. The first thing to do is connect the monitor to another system unit or even to a laptop (it doesn’t matter). If there is no other computer nearby, you can try to connect the monitor to the built-in video card if available (after disabling the discrete one). So we can check exactly what the problem is, in the video card or in the monitor itself.
If the problem is in the video card, then you can remove the cover, then pull it out and insert it back into the connector. If it does not help, you need to carry it to the service, but we will be sure that the problem is not in the monitor.
Operating system problems
Problem. If you still do not know why the monitor does not turn on, then there may be a problem with the operating system. There are times when the computer turns on normally, information about the BIOS is displayed on the screen, and after that a black screen appears and the picture disappears. In this case, it is even possible that the Windows startup sound is played.
This is possible in cases where a system failure occurs, if you have previously installed any programs that change the visual style or when infected with viruses that can interfere with the operation of the OS and lead to driver failures.
Decision. The solution in this case is quite simple. Start your computer in safe mode and perform a system restore to an early state. After that, be sure to scan the system with a good antivirus.
If the computer does not enter Safe Mode and the system cannot be restored, then the problem is in the operating system and you need to reinstall it.
Why the monitor does not turn on when I turn on the computer
For many users, a computer is a reliable assistant both at leisure and at work. But like any electronics, it can fail either completely or partially. We want to talk about an unpleasant situation for many when a monitor stops working on a computer. On specialized technical forums, the question is often raised of what to do if the monitor does not turn on. It should be understood that the problem may lie both in the monitor itself and directly in the computer.
Indeed, in the PC system unit there are many components that are responsible for displaying the image on the monitor. With their unstable operation, the image may disappear from the monitor, and the user will primarily sin on the broken monitor. In fact, there are several main reasons why there are problems with displaying the picture on the monitor. We will not only analyze these reasons in detail, but also tell you how to eliminate them to restore the computer’s operation.
Most often, the monitor does not work in the following cases:
- There is no power
- Incorrect connection of the connecting cable
- Picture Adjustment Problems
- Video card driver problems
- Defective graphics card
- Operating system problems
- Defective monitor
If you are faced with the problem of a non-working monitor, then for sure one of its reasons is indicated above. Now more about everything.
Why the monitor does not turn on when the PC starts: possible causes, solutions
If the monitor does not turn on when the computer starts up, there may be various reasons. Not only beginners, but also experienced users can find themselves in a state of stupor when they find themselves in a similar situation. What to do? How to identify the source of the problem and fix it?
Monitor is not to blame!
As strange as it may sound, in 9 cases out of 10 the screen has nothing to do with breakdown. It continues to work, the power button may flash, as if the device is in standby mode. But the image is not displayed on the display, instead the inscription is visible: “No Signal” (No Signal). This indicates that data is not coming from the system unit.
What’s the first thing to do? Be sure to check the connection. One end of the VGA / DVI / HDMI cable may have fallen out of the socket. Or maybe someone deliberately decided to harm you and pulled out the cord. Alas, this happens too.
The following are other common reasons why the monitor does not turn on when the computer starts up:
- The PC power supply is damaged (it does not work at all or its voltage is not enough to meet the needs of the system);
- Defective RAM;
- The video adapter is out of order (clogging of contacts is also possible);
- The chipset is “covered”. A rare and very sad situation;
- The problem is really in the monitor.
This is all good, of course, but I’m sure you are more interested in specific steps to eliminate the defect. Here you need to be especially attentive to detail, as you have to pinpoint the source. And this will help any signals that the computer will give. Now let’s move on to a detailed analysis of solutions.
Diagnostics and “treatment
The fact is that there are situations when the system does not start immediately, but “thinks” for a long time. But then (after 2-3 minutes) the picture appears on the screen, the download continues. Therefore, it makes sense to wait a bit. If the screen says “No signal” and nothing happens for several minutes, you should go to active actions.
You do not need to immediately remove the case cover and look for a breakage with your eyes. First you need to narrow down the “circle of suspects”:
- You can exclude the monitor from the list of reasons in a simple way: connect it to another “system unit”, a laptop. If the image appears, then we continue to look for a malfunction inside the PC.
- Press the power button on the system unit. Have you heard the characteristic squeak that was earlier during normal PC startup? If nothing happened, then the problem is definitely inside the computer.
- Check the ribbon cable that connects the hard drive to the chipset. Both ends must fit snugly into the slots. At the same time, view the power cable connected to the HDD.
- Pay attention to the noise of the fan installed on the power supply. Is he present or not? If only silence, no hum, then the power supply unit is inoperative. But there is another, very commonplace reason: someone unplugged the power cable or pulled it out of the computer. If there is a power supply button on the back of the case, it is also worth checking.
- If your motherboard has an integrated video card, try connecting to it. Suddenly the monitor “comes to life”, which means the defect is associated with a discrete video adapter. You should remove the cover and see if the cooler rotates on it (if any). Perhaps the board has moved a little or the contacts are dirty. gently pull it out of the slot, clean the contacts with cotton wool dipped in alcohol (or a regular eraser). Did not help? So the graphic card needs to be repaired / replaced.
- Often, the monitor blinks or does not work during computer startup due to the RAM modules installed on the motherboard. Maybe one of them “burned out” or a little moved away, the contacts are clogged. You need to pull it out, try to swap the planks in places, clean them with an eraser, as is the case with a video card (see above).
I am sure that you were able to identify and eliminate the trouble. Is the monitor working? Share your story in the comments. If the steps listed in the instructions did not help, it is likely that you will have to carry the computer to the service, since you are dealing with a hardware malfunction. At home, without a special tool and experience, it is better not to take any action.
Video card problem
To check the state of the video card, you need to get it out of the system unit, clean it from dust if it has accumulated, and then carefully inspect it for dark spots, swelling and anything that does not look like a “healthy” video card board.
If you find any signs of damage, most likely the video card is out of order during overheating.
Try to insert a known working video card and try to turn on the computer.
Still not working? If there is an integrated video card on the motherboard, try connecting the monitor to it and start the computer.
If this does not help, pay attention to the computer power supply.
The power supply unit can generate enough power to start coolers, indicator lights and other non-essential operations, but this power may not be enough to fully turn on the computer with all its components.
This often happens if an old computer with an old power supply unit decides to upgrade with a new powerful video card.
In this case, due to lack of power, the video card does not start.
What to do: the fan runs at full speed and the computer does not turn on or freezes
Good day, dear readers!
Today I will tell you about such a problem with a computer or laptop, when the fans of the cooler. most often the processor cooler. work at maximum and the computer does not turn on, and in some cases freezes.
The problem is not pleasant, and not always easy to solve.
Often, when “does not turn on” people can mean the absence of an image, with working coolers and other standard computer noises.
In our case, the problem may be in a poor connection between the monitor and the video card (the simplest case), in the BIOS, video card or central processor.
Bad connection of the monitor to the video card
Least dangerous and easily solved problem.
All you need to do is make sure that the wire connecting the monitor and the video card is well connected and in good condition.
If everything is connected as it should, and the problem remains, then you should turn your attention to the video card.
And also prepare for more serious problems.
In the case of the BIOS, you need to remove the small battery that powers the BIOS’s system clock.
After removing it, wait about a minute, then plug it back in and turn on the computer.
Perhaps this will help, but only if you do not have the following case.
This is a rather unpleasant problem, which is characterized by increased work of cooling systems and no image on the monitor.
In the event of a failure, the CPU quite often emits a huge amount of heat, and the heating may not be gradual, but instant.
In this regard, the malfunction is determined. with instant heating (it occurs in 3 seconds or so), the computer will not turn on, and if it is gradual (more than 30 seconds), then the computer will freeze until the temperature reaches the limit and the computer does not will shut down due to overheating.
It is these high temperatures that force the cooler to work at its limit, trying to reduce the temperature of the processor.
The simplest solution to such a malfunction is to replace the thermal paste, as well as the cooling system, if it is faulty.
Also, if there is a lot of dust in the computer, then you should first clean the components from it and check the performance after that.
A defective processor is quite difficult to diagnose on your own for any damage, and also dangerous. considering how high temperatures it can, therefore, in this case, I would recommend taking it to a service center.
Computer problems always cause some stress and tension.
The main thing is to determine the malfunction, otherwise you can aggravate the situation, or spend money on replacing the working component.
First of all, identify the symptoms of malfunctions, and if you are not too knowledgeable in fixing computers, contact the specialists.
This is where I would like to end this article.
The computer turns on, then a blue background and cursor are set
the computer turns on but does not start. nothing is written on it. first, as usual at startup appears. ASUS, flashes several times and darkness. It also does not start in safe mode. What could be the reason?
turns on and reboots every time
Windows 7? We tried to boot in safe mode?
Only the fans start up, I tried to turn it on, sometimes it starts up, it happens from the 5th time, it happens from the 20th
If you turn it off into sleep mode, then the norms quickly start,
Strange, why is it installed on the sly (to remove the checkmark somewhere)? without the knowledge of the person. just like a virus,
Please help me with advice! I described the situation on 04/19/2019. I have a computer and a laptop and this happened to both, the situation is one-on-one, although they are not connected with each other, some kind of mysticism (((
Test your graphics card
Of course, a burned-out video adapter cannot display any picture and the screen will remain black. To check, taking precautions, disconnect the internal power cable from the video card. Unscrew its fastening screw, and then slightly bend the slot latch and carefully pull out the adapter.
Clean the contacts of the card with an eraser and alcohol, then reinstall it and, collecting everything in the reverse order, try to start the computer again.
Another option is to replace the video card with another, obviously working one. If this helps and a picture appears on the monitor, you will have to fork out for a new video adapter.
Check the video cable connection
Make sure the signal wire is also securely fixed. HDMI and DisplayPort must be fully inserted, and VGA and DVI are additionally secured with screws on the plugs. Then do the same with the connector on the other end of the cable that connects to the computer.
If possible, try replacing the wire or connect through a different connector. For example, if your video card and monitor have multiple ports, use DVI instead of VGA or HDMI. Or vice versa.
Another cable can simply be connected to the wrong video card. This happens when the motherboard has a pin for integrated graphics, but a discrete adapter is involved. If you have recently disconnected the monitor wire, check if you have connected it correctly. The plug must be inserted into the connector below, separate from the main port group.
Make sure the monitor is working
If none of the previous tips helped, the monitor might be broken. The easiest way to eliminate this is to test the display on another computer. Ideally, exchange monitors with someone else for the day.
However, there is another way. Disconnect all wires from the display except the power cable and turn on. If a message about no signal or any other information appears on the screen, then everything is in order with the monitor and the problem is in the computer.
If the display remains black and no indicators on the case are lit, the monitor will have to be carried to the workshop for repair.
Switch signal source
Some monitors with multiple ports have a function to switch between signal sources. Like on TVs. The correct connection may not be detected automatically, and then the image on the screen, of course, will not be.
Switch the signal source using the Input or Source button with a square with an arrow inside. For details on this function, see the operating instructions.
Rate the reliability of your contacts
RAM, video card and other components are installed in slots on the motherboard. If you have recently changed them, cleaned them or removed them from the nests for any other reason, there is a possibility that the components are not fully inserted. Due to poor contact, there may well be no image on the monitor.
To check, disconnect the power cable from the computer, carefully remove the side cover by unscrewing the screws at the end of the rear panel. Examine the video card and RAM sticks. Make sure they are inserted straight and all the way. The latches on the sides of the RAM must be closed, and the video adapter must be fixed with a screw to the chassis chassis.
The computer may not turn on due to one or more problematic memory modules. Usually the system speaker emits several sounds, although not always.
On a de-energized PC, remove the cover. First, take a photo to get your memory back in place after experimenting. Then spread apart the latches on the edges of the RAM slots and remove the modules. Clean the contacts with a regular stationery eraser and rub with rubbing alcohol if available.
Put the memory back in place, reconnect all cables and check if the computer works. If not, then you can still try to remove all RAM modules, leave only one or swap them in the slots, trying to start the PC after each manipulation.
If an image still appears on the monitor, then the problem is definitely with the memory and it will be necessary to replace the defective modules with new ones.
What to do if the monitor won’t turn on
Often the cause of the problem lies not in the display itself, but in the computer. Check each option and solve the problem yourself.
Make sure power is available
Before proceeding with further diagnostics, you need to make sure that the monitor is receiving power. This is indicated by the LED on the front panel, which should be lit or blinking in one of the colors.
If the indicator is off, check the power buttons on the monitor and extension cord: it is possible that someone or you yourself accidentally pressed them during cleaning and did not notice.
If everything is in order there, then the reason may be in the cable. From the side of the plug, it is fixed in the outlet quite clearly and reliably, but it is simply inserted into the monitor power connector. The wire may have moved slightly in the socket and the contact is broken.
Try to insert it a little more into the connector and check the indicators. There may be problems with the cable itself. To eliminate them, replace the wire with another, for example, from the computer power supply. they are suitable (unless it is a model with an external adapter).