I Turn On The Computer And The Monitor Is Black

Often the unit does not want to start due to a malfunction of the start button. But in the first seconds, the fans start up, stopping chaotically. The result of the “law of meanness” is the burned-out south bridge of the motherboard. He is responsible for communication of slots and processor with the north bridge. Such cases occur due to improper connection of devices or flash drives through the USB connector.

I Turn On The Computer And The Monitor Is Black

The latter option will lead the user to an electronics specialist. Only he will be able to remove the faulty element. But the repair procedure is expensive and it will be difficult to control the correctness of the actions. Therefore, it is recommended to contact service centers where the whole process is debugged to the smallest detail.

Before seeking qualified help, you should try to clean the fans from dust, inspect the wires for bends and open the insulation. Also disconnect the start button from the motherboard. Then there is a chance that the PC will work.

I turn on the computer black screen and the system unit is working what to do

Possible problems

The motherboard has a PC status indication. If there is a change of flashing diodes, then the computer tries to start. We consider the case when the computer does not turn on, black screen, coolers work.

It is often possible to start the start page after several restarts. Users are lost when the picture is completely missing. In such situations, difficulties arise even in experienced electronics engineers.

The easiest way out is to take the system unit to professionals. But what if the PC is old and costs much less than the repair costs? Then you have to figure it out on your own, following the advice of experts consistently. Information can be obtained from more experienced users, but you should not completely trust it. Even children write comments, there is no way to check the competence of the advisor.

diagnostic sequence

The whole procedure for finding the source of the problem is divided into four points:

  • Determined with signs of malfunction, from here the sequence of the following steps is built. In our case, the computer does not turn on, the fans are working.
  • Inspection. all the covers of the system unit are opened, they carefully examine the internal contents. PCs are often installed in garages or in an area where dust and metal chips accumulate. If debris is found inside, it is recommended to clean all open spikes, wires, microcircuits. For this, an alcoholic liquid or compressed air is used. You can also use a brush and vacuum cleaner.
  • Re-launch. If they fail, they begin to disconnect each element from the motherboard. Observing the state of the LEDs, conclusions are drawn about the serviceability of SEPARATE modules. You only need to leave the processor, power supply.
  • Diagnostics is carried out based on the user’s skills. Examine the burned-out paths and elements. Swollen capacitors are a sign of malfunction.

Computer shuts down abruptly at startup

What if the computer turns on and off in just a few seconds? The problem lies in the faulty power supply (it may simply not be enough power after the system upgrade, as mentioned above, the jumper was not returned to its place after clearing the CMOS) or the lack of cooling (when the processor, card or any of the bridges overheats, the system automatically turns off the power to protect the components from damage).

Check if the cooler with the heatsink is installed correctly. Next, we clean the dust, replace (if necessary) the thermal grease. If this does not help, we install a knowingly working power supply. There have been no changes? The motherboard is faulty and only the service center will help.

If the computer restarts itself during operation, this indicates problems with the cooling of the processor (see How to choose a processor) or the card. Sometimes. in damaged sensors, which are responsible for taking temperature readings.

In this case, you need to change the thermal paste, make sure that the cooling system is functioning properly.

If the heating remains at the same level (checked in AIDA 64), the hard drive is additionally scanned (see How to choose a hard drive) for viruses. Probably a so-called miner “lurked” in the system files. a program that earns bitcoins for an attacker (is engaged in mining).

If the computer itself turns on, it shows the logo of the motherboard manufacturer, but Windows does not boot, this is a software error. An easy fix is ​​to reinstall the system (see How to install Windows 10 yourself).

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If, even after this, problems with loading remain, you need to check the hard drive for “bad” sectors in the boot area (MDF). This is done by the Victoria HDD or MHDD program.

Easier. download a ready-made sample with a preinstalled applet for scanning hard drives, burn it to a CD, load (when turned on, press F2, F11, or F12 and select the device. DVD drive) and analyze (press F4. select the hard drive, after which press F4 again).

What if the computer does not turn on and automatically starts the OS recovery process? In Windows 8 and 10, wait for the operation to complete (sometimes it takes 2-3 hours). In Windows 7, you may need to insert the disk with the OS installer. the missing system libraries are copied from there.

The main causes of the malfunction

When the fans turn on and the computer is not working, it often happens that the startup still occurs. In this option, you should look for a malfunction in the monitor. First, inspect and change the cable if possible. The working state is determined by connecting to a laptop or second PC.

map. loaded element, it often fails in fans to play dynamic shooters. They pull out the board and try to start the computer on the internal graphics module. The launch is monitored by digital indicators. Difficult to diagnose faults with BIOS and motherboard bridges.

Why the computer won’t turn on

If the computer does not turn on or the OS does not load, there are several reasons for this.

Conditionally divided into:

  • software (operating system initialization error);
  • hardware (breakdown of a specific device).

It is easy to cope with software on its own, and not resorting to the help of specialists, while difficulties arise with technical ones. The main task to be solved in such a situation is to identify the cause of the problem.

Perhaps the power button is stuck, the power button is out of order, or the wires coming from it have moved away from the contacts on the motherboard.

To check by disconnecting the wire labeled from the motherboard “Power SW” and closing the contacts in this place with tweezers (imitation of pressing a button).

We check the power supply. disconnect the PC from the outlet, disconnect the wide 20/24 pin connector from the motherboard, connect it back to the mains and close the 4 and 5 pins with a paper clip.

If the power supply unit is working properly, the cooler will start in it (if there is a multimeter, compare the voltage at the outputs with the screenshots).

The computer beeps and does not turn on

Determine the name of the BIOS developer company (see How to enter BIOS) of the motherboard (from the technical documentation).

In AMI, 5 short beeps means a problem with initializing the socket, the problem lies in the processor.

Whereas in Phoenix. a breakdown of the hard drive (or SMD components, which supplies power to it).

8 short ones (or 1 long and 3 short ones) in AMI. a problem with card inclusions. In Award, a similar error is indicated by 1 long and 2 short beeps, in Phoenix. 3, 4.1 short “muzzles” with a break of 2 seconds.

Two short signals on motherboards (except for outdated Asus) inform about a problem with RAM (the image appears, at least. the manufacturer’s logo).

The lack of signals indicates problems with the power or the processor (perhaps they changed the thermal paste, and bent the petal on the contact pad).

If the computer beeps and does not turn on, the troubleshooting is performed in service centers with a test POST card (connected to the PCI bus).

What each of the codes means is indicated in the technical instructions.

I turn on the computer black screen, and the system unit works

Recently, a strange incident happened, a friend asked to look at the computer, she says I turn on the computer, the black screen, and the system unit works, but the monitor gave out an inscription there is a signal, hmm, strangely I think, well, since there is a signal, then the first thing to do is check the card, remove the card, blows. I put it back into the board the same thing, by the way, how to pull it out and put it back in, see the manual change the card.

Well, I think once the same thing, I’ll try to remove my card and put it in a friend’s system, I took off mine, put it into her system, turn on the computer, again the black screen, and the coolers work, but there is no picture, I was surprised again, I thought maybe there might be problems with the pci connector, means to check this Of course, I don’t have a breakdown, well, I’m going to insert my card into my computer, insert it, turn it on and I’m very surprised now I have a black screen, and the system manager seems to work and there is no picture, well, I think it’s like a virus.

First of all, I decided to try to boot from some live CD, insert the disc, nothing works, the computer does not even show the motherboard splash screen, well, I think the virus sits somewhere in the memory and I transferred it through the memory of the vidyuhi, although I didn’t believe much in it. but on the other hand, the computers did not have any contact, I think, but should I try to install another hard drive, since I had 3 of them nearby, I take the first one that comes across, take out my hard drive, insert another and oops! The screen saver of the motherboard appeared and the computer gives a picture to the screen, then I took another hard drive and tried it with it, the computer turned on again and started to boot, and I decided to put my hard drive back on from this computer, I turned on the computer, the problem disappeared.

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I did the same on my friend’s computer, just turned off the power supply from the PSU, disconnected its hard drive and put everything back again and the problem also stopped, the computer started to boot normally again, it seems to me that the malware was just in the buffer Hard disk and disconnecting it completely and plugging in the buffer again dropped and the hard started working again, I didn’t bother looking for the malware, because I had no desire, the main problem was fixed!

So, if you turn on the computer, you have a black screen and all the coolers are working, and the monitor displays the inscription there are connections, then try to do the same as I did, the problem may be eliminated!

Start Windows in Safe Mode on your computer

One of the most likely reasons why Windows or another operating system won’t load. system conflict due to which the OS cannot work correctly after turning on the PC. This can be caused, for example, by the fact that the user installs an incompatible program or drivers that conflict with Windows, and when the laptop / PC is turned on, the conflict will make itself felt from an unpleasant side. in the form of a black screen. How to remove it?

Fortunately, the developers of Windows have provided the possibility of a safe mode of entry into the operating system, which is designed specifically to eliminate various compatibility issues. By entering safe mode, you can remove all problems on the computer, resolve conflicts, then load Windows in normal mode.

So, to enter Safe Mode on a computer:

  • Remove from the computer all media and devices that can affect the boot Windows (flash drives, disks, etc.)
  • Restart or turn on the computer, depending on its current state.
  • To enter Safe Mode, hold down the F8 key during boot. If there are several operating systems on the PC (laptop or desktop version), then select the appropriate one from the list and then press F8 again to go to Windows Safe Boot Mode.

Further, in the boot parameters in safe mode, you can select one of the items and solve the problems of a black screen on a laptop or desktop computer.

Worst Thing That Can Happen: A Hard Drive Failed

Summary. In this guide, I tried to remember and collect from the Internet the most complete list of problems due to which a black computer screen appears. OS version doesn’t really matter, Windows 8, “ten” it is or is generally outdated XP. If none of the methods helped, something is not clear, or you have your own ways to solve this problem. please ask questions and add your ideas in the comments.

Most likely causes of a black screen on boot

First, you need to list the most common problems that cause a black screen, after which the operating system does not boot (in other words, a black screen when the computer is turned on). In rare cases, after loading, the user sees Not only a black screen, but also a cursor. causes:

  • Operating system conflict, which means that it cannot load the graphical environment normally.
  • Driver problem (incompatibility with the current operating system: for example, Windows 10 or Windows 7, up to XP)
  • Failed hard drive on a computer or laptop
  • Windows OS crashed and does NOT boot correctly (not in safe mode)
  • Other hardware problems or system conflicts
  • Windows cannot wake up from sleep state

Disable unnecessary programs and services from Windows autorun

There is a wonderful utility called msconfig, with its help you can speed up Windows boot. Although modern computers load the OS quickly, boot optimization can remove black screens for a few seconds.

  • Start. Execute. In the window, enter msconfig.
  • Services tab. here you can disable unnecessary services.
  • Startup tab. to enable / disable programs at boot.

In Windows 10, startup items can be disabled through the Task Manager (Startup tab). The status bar displays the status of the application.

Windows startup black screen: what to do if your computer won’t turn on

I don’t want to be banal, but the so-called “black screen problem” when loading the operating system after turning on the computer. one of the most common problems faced by owners of both desktop computers and laptops. The operating system that does NOT boot or the hard drive model are not very important in diagnosing the problem. How to remove the black screen when loading Windows 7, Windows 10 on a computer and laptop, the reasons for the failure, we will tell further.

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This manual will be supplemented, so do not hesitate to ask questions, I will clarify technical issues as much as possible and solve your problems with a black screen.

Using a bootable disk (Live CD) to fix errors and diagnose a black screen

When a black screen appears, it is advisable to check your computer and operating system for viruses. This can be done using “live CD”. We recommend using the 4MRescueKit boot disk to enter the system recovery mode. In addition to checking for viruses, livecd 4MRescueKit includes data recovery modules, file backup and a disk manager like PartitionMagic. Even if this does not help to get rid of the black screen of death, you can at least prepare for reinstalling the operating system or diagnose the health of the hard drive in this mode. Live CD fixes problems regardless of version: it could be Windows or Linux.

4MRescueKit Download Kit Helps Eliminate Software Errors on Disk

Viruses have damaged Windows system files

Many computer viruses are capable of deleting or damaging important system files. As a result, after loading Windows, a black screen appears, although the cursor may be displayed and react to your movements. Removing viruses does not always solve the problem, but you can try.

How to check your hard drive for viruses if Windows cannot boot? You need a work computer to which you can attach a hard drive. After booting under Windows, install the free antivirus Dr Web CureIt. The CureIt utility contains up-to-date virus databases.

Select the hard drive to scan and run the scanner.

If, after detecting viruses, a black screen appears when Windows starts up anyway, then you need to look for other reasons.

Remove programs that conflict and block the OS from loading on startup

In this case, the sequence of actions for elimination of the problem will be approximately the same as in the above case. The only thing that you need to specify in Windows Safe Boot Mode is “Enable Safe Mode”. Further, in this download mode, you need to go to the control panel and in the window “Programs and Features” sort by application installation date. Analyze what you have installed recently: it is possible that conflicting applications are a prerequisite for a black screen and inadequate loading of Windows from the system disk on your computer. One of the best software for uninstalling applications. free utility CCleaner.


After entering the bios password, there is a Windows 7 boot icon, the monitor has turned off (went into power-saving mode), the f8 key does NOT work.

  • Try to reset the BIOS, took out the battery from the motherboard.
  • Power saving mode will not work immediately after starting the computer, rather the problem is related to one of the components. Check the connection of the card with the motherboard, card with the monitor, etc.
  • If everything is in order with the BIOS, and Windows 7 boots, reinstall the OS. This seems to be the easiest way to get rid of the black screen.

After changing to Windows 7 from 32bit to 64bit, a black screen began to appear. Everything works when connected to a TV.

The 64-bit version may not have drivers installed on the monitor or card. Check on the manufacturer’s website if the monitor supports this OS. There is a suspicion that your vga monitor is not supported by this edition of Windows. Try to boot Windows in Safe Mode or from the option “Enabling Low Resolution Mode (640 × 480)”.

I am using VirtualBox with Linux. Turned off the virtual machine, after boot. black screen with an underscore on the left.

If you save the state on the virtual machine (Suspend), in principle, no problems should arise. If you turn off the virtual machine, then Linux tries to boot when you turn it on. Why a black screen with an underscore appears after a Linux reboot is a separate question. Check the key settings of the virtual machine. If the error persists, try installing Linux on Vmware Player.

When I turned on the computer, nothing appeared. The camera is working and the computer is on. What is the problem. RAM or hard drive?

To diagnose the problem, it is advisable to recall previous events. Whether the computer showed any symptoms of a crash (hard disk noise), whether you deleted system files on the disk, etc. This will help narrow down the list of possible causes. Next. Trace at what stage the black screen appears. If the hardware initialization is successful, then the problem is in the operating system. that is, rather than starting Windows. In this case, we advise you to reinstall the OS from a bootable USB flash drive or disk.

I changed the card. I start the PC. there is a BIOS, and then just a dark screen. This is because of the drivers?

Maybe. Go to Windows Safe Mode, uninstall old drivers and install new ones. Then restart your PC. If it doesn’t help, read the entire article.