Laptop does not start black screen fan is running

Reason 1. switching display mode

The first reason for the screen not working when turning on the laptop and the most annoying one upon detection, I think, is switching the display mode. Many laptops have the ability to connect a second screen. be it a TV or monitor. So, by default, when you SIMultaneously press the Fn button and the button to switch the image receiver from the F1. F12 series on the keyboard, the video signal is sent from the laptop display to the external screen.

laptop, does, start, black

Most often, the F4, F5 or F8 buttons are responsible for this. all manufacturers have different ways. Depending on the settings of the video driver, the image will be stretched over two screens, duplicated or translated only to the second screen. So, if you press these buttons by accident, you can lose your peace of mind. You will have to run headlong to the service or start disassembling your laptop. To prevent this from happening, first of all, check this option for the appearance of a black laptop screen.

Cleaning contacts of RAM

This is usually done easily. Power off the laptop, disconnect the battery, and turn it upside down.

Removing the cover for installing memory in a laptop

A cover should be present here, usually attached with a pair of bolts. It needs to be unscrewed and opened.

You should see something like this.

RAM sticks in a laptop

Small rectangular boards are RAM. They all need to be removed by moving the metal holders aside.

Removing RAM in a laptop

After removing, wipe the contacts with a regular eraser or alcohol and if there are several memory sticks, try to insert them one at a time, each time turning on the laptop.

The key is on the RAM bar. Wipe the contacts to the right and left to the end

If all else fails

In this case, with a high degree of probability, one can judge about the failure of the north / south bridge and / or video card.

For a temporary solution to the problem, some heat the released element with an industrial hairdryer. In this case, it is often possible to bring the laptop back to life, albeit not for long.

Laptop motherboard bridges and video card

The most correct option would be to replace the desired chip with a new one, but this can only be done in a specialized workshop. The cost of such work usually ranges from 60 to 120.

Welcome to the blog! Today I will tell you what to do if the laptop does not turn on, you see a black screen, the coolers are working and the indicators are on. It turns out that the laptop itself boots up, but only the screen works. Here are my top 5 reasons for a black laptop screen, based on personal experience. This top is suitable for notebooks from Asus, Acer, HP, Lenovo, Toshiba, Dell, MSI, Samsung and others.

If all else fails

In this case, with a high degree of probability, one can judge about the failure of the north / south bridge and / or video card.

For a temporary solution to the problem, some heat the released element with an industrial hairdryer. In this case, it is often possible to bring the laptop back to life, albeit not for long.

Laptop motherboard bridges and video card

The most correct option would be to replace the desired chip with a new one, but this can only be done in a specialized workshop. The cost of such work usually ranges from 60 to 120.

In this article, we will talk about such an unpleasant symptom for any laptop, such as a black screen when turned on. over, the light bulbs can burn and even the cooler will spin. But there will be no image on the screen.

Now you will learn what to do if you find yourself in a SIMilar situation in order to try to bring the laptop back to life on your own at home.

Reason 2. failure of backlight LEDs or inverter

If your laptop displays a black screen when turned on, then you can often see the desired image on it in bright light. Most likely, the reason is the failure of lamps or LEDs of the backlight or inverter. The backlight inverter is a board that generates the high voltage required to ignite CCFL lamps or power a line of LEDs.

If you have an old laptop, the backlights will fail over time. They need to be changed to new ones of the same or to modern LED backlighting. Fortunately, now such kits for finalizing the backlight of a laptop or monitor are sold in abundance.

To repair the screen backlight, you will have to disassemble the display and change the lamps and inverter. LED backlighting most often fails in pieces or single LEDs. Miniature LEDs for these lines are freely available.

If only the backlight inverter is out of order, then they can be found on ebay and aliexpress. Faults in lamps, LEDs and inverter are usually found by visual inspection and less often by dialing.

Also, don’t forget to check the loop. going to the screen. In older laptops, it often frayed when opening and closing the lid. In modern electronics, this issue is not so acute, but you should always check.

Reason 4. black screen and BIOS problems

When the laptop does not turn on and it is clearly visible that the black screen is on, and the video card is working properly, there may be problems with loading BIOS commands. This is often due to a dead battery or BIOS glitches. To get started, reset the BIOS by shorting the Clear BIOS pins or remove the battery (often CR2032) and close the contacts to which it was connected. Sometimes a rechargeable battery is installed in laptops. but they also lose capacity over time. After clearing the BIOS, you may need to configure it again. Most often the default settings work.

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It so happens that the EEPROM chip. in which the BIOS is flashed fails. Here you need a programmer. to confirm this by reading the byte and a new ROM chip for repair. Before repairing, you need to find the firmware file on the official website of the laptop manufacturer. How to remove the BIOS chip, see the video.

What makes this happen?

There may be several reasons for this laptop behavior. Starting from the lost BIOS settings (UEFI) and exit from the standing matrix (matrix cable), and ending with serious problems with the motherboard (north, south bridges, video card).

Now you will learn what you need to do in stages to diagnose and fix this problem.

What makes this happen?

There may be several reasons for this laptop behavior. Starting from the lost BIOS settings (UEFI) and exit from the standing matrix (matrix cable), and ending with serious problems with the motherboard (north, south bridges, video card).

Now you will learn what you need to do in stages to diagnose and fix this problem.

Connecting an external monitor / TV

If after the result described above there is no result, then you need to try to display the image on an external monitor or TV to check the performance of the matrix and its loop.

VGA output in laptop for connecting an external monitor or TV

To do this, you will need any monitor or TV, as well as a cable that connects your desktop computer to the monitor. It is called VGA or HDMI.

HDMI output in a laptop for connecting an external monitor or TV

After connecting a monitor or TV to your laptop, try turning it on. If the image appears on the monitor, then you have a problem with the matrix or matrix cable.

We connect a laptop via an external monitor

Windows starts loading, but everything is bad.

It’s a kind of option that, as usual, Windows starts loading, but then the laptop reboots itself, errors appear on a black or blue screen. Here again, there may be a problem in the hardware, ie. hardware failures, and maybe software.

The surest way to test, again, is to reinstall Windows. “Lite” check option. start from a bootable USB flash drive with Windows. If the laptop with it behaves SIMilarly badly, then the case is probably rubbish, you need to carry it for repair. In general, the problem of loading Windows is a completely different story.

Fans are making noise, but laptop screen is not working

Maybe the laptop itself turns on, but the screen does not work. Take a closer look at the monitor, maybe there is something there, but the backlight does not work. Define hotkeys for turning on the backlight on your laptop and press them. For example, on many Lenovo models these are the “FnF2” buttons.

The screen may really not work, and there are also various artifacts instead of an image. The surest way to check if the screen or laptop is at fault is with an external monitor by connecting it to the VGA / HDMI output. If there is a picture on it, then the laptop screen will definitely not turn on. Read more about this in the article about stripes on laptop screens.

A discrete graphics card can often be the cause of a malfunction, especially for those who like to play games on a laptop. Due to a poor cooling system, dust / pollution thereof, or misuse of your “friend”, video cards overheat and break down faster. This is especially true for nVidia video cards (GeForce 8400M, 8600M, 9300M and others).

No need to play with the computer on your knees, on your stomach, or in any position that blocks the vents. It is advisable to use laptop cooling pads. And in general, if a laptop is not positioned by the MANUFACTURER as clearly GAMING, then it is not recommended to play heavy toys on it for a long time, even if it pulls them. Monitor your graphics card temperature.

So, if the matter is in the video card, then try to pull it out, if the design allows, or turn it off using the switch, which is present on some models. The beech can work without a discrete video card, demanding games just won’t run.

There may be more serious reasons: missing / not working processor or memory, broken BIOS firmware, non-working laptop north bridge (problems with the motherboard).

The laptop does not turn on and shows no signs of life

In most cases we have power problems. The first thing to do is connect the laptop to the power supply and check that there is voltage in the outlet :). Power adapters usually have a light bulb to indicate they are working. And on the laptop there is an indicator that signals the inclusion in the network and / or battery charge.

Most often, the power supply does not work, or it functions inferiorly (here just try a SIMilar one), bad contacts in the connectors, broken or bent wires. Look at the whole thing and draw a conclusion. at what stage the power is lost.

So that there are no problems with the power connector, I advise you to plug the power plug into the laptop first, and then only the power cord into the outlet. By doing this, we exclude the possibility of a short-term appearance of a spark when the plug is connected, which spoils the contacts.

If everything “burns”, and the laptop still does not turn on, then the problem may not be in the power supply. Try again to remove the battery and turn on the device again without it, then after 10 minutes put the battery back. Also disconnect all connected external devices (you can also disconnect the Wi-Fi adapter if the design allows).

Try to turn on, and if it works, then return the devices one by one, and so you can determine what was the matter.

If your laptop does not turn on and there is still a warranty, then immediately contact the service center!

Perhaps this is all that you can do yourself without disassembling the laptop, if it does not show signs of life at all or shows a black screen. serious reasons may include a non-working motherboard, a broken internal power controller, a south / north bridge, broken contacts inside the device, BIOS firmware failure, and others.

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Writes that it is impossible to start from the boot device

There may be different messages in English, for example “Error loading operating system” or something SIMilar, and then the laptop will not boot. First, remove all flash drives and disc from the drive and reboot. If it does not help, then the matter is either in the hardware or in the software problem of the hard disk.

The first one is solved by contacting the service center, but first you need to check that the problem is in the disk. The most affordable way is to reinstall Windows yourself. If it helped, then the problem was at the software level.

Constantly reboots or shuts down

The laptop can reboot indefinitely before attempting to boot Windows. This is a serious hardware problem, the south bridge may overheat, usually due to a short circuit in it. Most often this happens due to a breakdown via USB (remember what you inserted into the USB connectors).

Or processor overheating due to a dust clogged cooler or a loose heatsink. But this is rare and is mainly accompanied by high fan speeds. In this case, the laptop may turn off or reboot at different times.

In the absence or poor power supply, the following picture can be observed: the device turns on, but quickly goes out due to a dead battery.

Laptop won’t turn on. problem solution!

Worked your laptop for a year or two and stopped turning on? Or maybe it didn’t work at all # 128521; Well, such a nuisance happens, and in this article I will tell you what you can do in this situation yourself, and when you need to contact the specialists at the service center.

All problems with a laptop can be divided into two parts: hardware and software. Hardware problems are physical problems with the device, i.e. when repair is needed “by hand”. And the software can be solved on the spot, without getting up from the chair. This includes problems with BIOS setup, operating system, and programs.

First, let’s define our problem a little. If the laptop does not turn on at all, i.e. does not show signs of life, then the problem is definitely hardware. If it comes to loading Windows, but then something goes wrong, freezes, reboots, then here is 50/50. Next, I will describe the diagnostic steps, and you can skip those problems that you do not have. Accurate fault diagnosis is already half of the repair.

Turns on, shows a splash screen or writes something and hangs

It may be that the initial splash screen appears or information is displayed, but then the laptop does not start, it also beeps or writes about errors. The probable cause is problems with BIOS settings. You just need to enter BIOS and reset all settings to default. In different versions this item may be in different places, but the name is approximately the same “Load BIOS Defaults”. the keyword “defaults”. Then exit with saving the settings (“Save Settings and Exit”).

Please note that the system may be reporting some kind of error, but further download is possible, you just need to press a button. For example, it can write “Press F1 to continue”, which means you need to press F1 to continue loading. This usually happens when the battery on the motherboard runs out (not to be confused with a large battery), the time and BIOS settings get lost. The battery must be replaced at a service center.

This is the SIMplest thing you can do yourself, because problems can be more serious, for example, a hard disk or RAM failure. With some skill, hard drive problems can be blindly diagnosed by listening to laptop # 128578; When turned on, the working disk spins the engine and crackles for a couple of seconds, reading information. In case of problems, the engine may unsuccessfully try to start several times, or the heads crackle cyclically, trying to read something from the plates, while everything hangs on the screen.

Some models have open access to RAM sticks. If there is a suspicion of it, then you can try to remove the trims, carefully clean the contacts (see how to do this in the article “Why the computer does not turn on”). If it doesn’t help, then leave one memory module (if there are several) and try to start. If there is only one bar, then move it to another slot.

Let’s sum up

So what if the laptop won’t turn on? First, think about what happened, what was the last time they did it. If you played for a long time, then the video card or other chipsets of the laptop probably overheated and a qualified repair is needed here.

If you installed some programs, rebooted and that’s it, then there are most likely errors with Windows. The main problems that can be diagnosed and / or solved by myself, I described in the article. Finally, I would advise you not to make rash conclusions and not disassemble the laptop without proper experience.

Power socket problems

Remember that cup of tea that was poured on the keyboard a week ago? This is the likely reason why the laptop does not turn on. What to do in this case? First look at the charging panel.

If the battery light is off, then the power connector is most likely broken. There is only one way out. go to the service center.

Why a black screen on a laptop and it won’t turn on

Almost every second Windows user is faced with the problem when the laptop does not turn on and at the same time only have to contemplate a black screen. We can say that this is almost the most common breakdown.

However, everything may not be so serious and perhaps there is no need to run to the service center for help. First of all, you need to figure out the causes of the malfunction yourself. Perhaps it will be possible to fix the problem with your own hands, without contacting specialists.

Broken hard drive

Blue screens suddenly appear? Does your laptop make strange noises when turned on? This means that the problem segment is the hard drive.

There are quite a few problems associated with it: mechanical damage, pollution, a conflict with the motherboard. To establish the type of damage “by eye” will not work. You can try to restore it using the program.

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SIMilar articles. Loader flew

This is the program that launches the operating system. It can be restored via rollback in BIOS for Windows 7, or automatic recovery in Windows 10.

What to do if the laptop turns on for a long time and a black screen appears

Black screen and laptop take a long time to turn on? This may not necessarily be due to part breakage. First, you should remember all the latest machinations done with the device.

If the device has worked intensively for a long time, then it is most likely overheating. In this case, the laptop needs to be repaired by a qualified technician. Perhaps new programs or games were installed before that. After that, a reboot was performed, and the laptop did not turn on, then these may be Windows errors.

However, first you should pay attention to whether the device is connected to power.

If the laptop does not turn on when using only one battery. Perhaps he is SIMply discharged and there is no point in panic. If the charge is in full order, then it is worth connecting the computer to the network.

After the device was connected to the network, it turned on without any problems, then the fault lies in the battery.

Perhaps it needs to be replaced with a new one. But if the computer still does not work, you need to check whether all the plugs are in place and whether they come off. The wire may have been pinched or broken somewhere.

It is recommended to check if there is voltage at the outlet. Each laptop has a special light that signals the battery charge and connection to the network. If all lights are on and the device still won’t turn on, the problem might be something else.

It could also be a problem with the hardware settings of the device. In this case, it is not necessary to contact a specialist. The basic steps to fix this problem can be done with your own hands without anyone’s help. To do this, you must reset the hardware settings. The following guidelines will help you cope with this task.

Software problems

A black screen is more often due to mechanical damage, but the following factors should not be excluded.

If the laptop is not completely disconnected, but SIMply behaves strangely, then you can:

  • a) Roll back the system to the previous restore point. To do this, select the “Recovery” item in the control panel and follow the instructions of the Wizard.
  • b) Start the system in safe mode and reinstall the drivers.

Reasons for malfunction

The reasons due to which the laptop screen does not work can be divided into several groups:

  • Damage to the south or north bridge of the motherboard due to mechanical interference or overheating of the device.
  • Malfunctions with the central processor or video card.
  • Broken loop, laptop matrix or backlight.
  • RAM crashed or fell out of the socket.
  • Malfunctions in the hardware settings of the computer.
  • The battery stopped working.

In the first three cases, repair or replacement of parts is required. You can try to eliminate the malfunctions described in the remaining paragraphs yourself.

Advice! If the laptop shuts down after a long period of time and does not show signs of life, it is likely overheated. Check that nothing is blocking the air outlet, clean it from dust, and then turn on.

Important! Determine if the laptop starts up when you turn on the power button (you hear the noise of coolers, hard drive, LED lights up). Your further actions depend on this.

If the laptop shows signs of life when turned on:

  • Connect it to a 220V network, check if there is voltage (look at the laptop charge indication).
  • There is an indication, but the laptop does not turn on. disconnect the charger from the laptop.
  • Pull out the battery as shown in the figure.
  • Clean clogged contacts.
  • Press and hold the power button for 20 seconds to remove the residual charge from the motherboard and laptop components.
  • Connect the charger and turn on the device, check the screen operation. If it works, replace the battery and check it again. Laptop won’t turn on? We recommend replacing the battery.

Faced a SIMilar situation on a personal computer? Read this article. The laptop “comes to life” at startup and you have a personal computer screen or a TV with HDMI output at hand. check the laptop’s operation, perhaps the malfunction is really in the laptop:

  • Connect monitor via VGA or HDMI outputs.
  • Start your laptop and follow the process.
  • If the BIOS and Windows boot was successful, there is a problem with the screen or its connection (perhaps a loop has come off).

Laptop users experiencing black screen issue have been helped by a way to reset BIOS to default. If the computer shows signs of life (coolers are working), connect it to a monitor or do the blind procedure:

  • Turn on the device.
  • After turning on, press the F10 key for 10 seconds (enter BIOS).
  • A menu will open, wait and press F9.
  • Press Enter (rollback to original settings).
  • Press F10 (exit BIOS) /
  • Press Enter to save changes, exit and restart your computer.

Important! If the previous methods were unsuccessful or your device does not show signs of life, try another option below.

Checking RAM sticks

There is a possibility that the motherboard has stopped recognizing random access memory (RAM):

  • Unplug the laptop and take out the charger, turn it over, remove the screws.
  • Open the back cover.
  • Gently push the latches apart to remove the RAM.
  • Take out the OP strips and clean the contacts with an eraser.
  • Change the connector (if there are several) or places of the OP.
  • Insert the OP backwards at a 45% angle and press lightly from above. The clamps will do all the work themselves.
  • Check the connection of other devices (hard drive or SSD bracket).
  • Close the cover, plug in the device and check its operation.

If the advice of the article did not help you, we recommend that you contact the service center. Most likely the malfunction is in the hardware. Also write to us, maybe together we can find the problem.

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