How to fix a black screen on a laptop

1. Remove the battery on the back of the notebook, connect the computer with only the power adapter, and try to turn on the computer, if the boot is normal, then it is caused by poor battery contact or battery failure.

2. Only use the battery, do not connect the power adapter, if the boot is normal, then it should be caused by a problem with the power adapter or a short circuit in the power interface of the notebook.

3. Unplug the power cord, remove the battery, and press and hold the power button for 30 seconds without letting go. Try to boot up, if the boot is normal, then it is only caused by the abnormal BIOS of the motherboard.

4. Unplug the power cord, remove the battery, open the back cover of the memory, plug in and unplug the memory, wipe the gold finger part with an eraser, and plug it back in (don't reverse it).

5. If the above operations cannot solve the problem, it is recommended that the notebook be sent to the maintenance center for testing.

Here are a few things you can refer to.

Reasons for computer black screen and freeze:

Hardware:1The equipment is unstable due to poor board contact or machine collision problems.

2.Computer dust causes poor heat dissipation and crashes the CPU or graphics card chip, which has hardware design flaws, such as some recalled graphics cards or computer parts.

Software: 1 is controlled by a remote Trojan, and everything on the computer is in the hands of hackers.

2.Viruses or malicious plug-ins invade the system, resulting in system damage.

3.The driver installed on the computer is not compatible, and the computer will crash after running for a period of time.

4.The compatibility of the software itself, the serious conflict between the software incompatibility and the system conflict, and the computer crashes.

First of all, run the McCafe antivirus software that comes with Dell, select a full scan to clean up the Trojan virus in the computer, and then use the system modification function to repair the system files that are damaged by various reasons. If your computer still has a blue screen, we need to analyze the dump file to determine the cause, please click on how to extract the dump file after the blue screen.

There are 4 ways to recover laptop black screen.

Method 1: Ctrl+Alt+Delete.

If you encounter a sudden black screen, you can try to use the Ctrl+Alt+Delete key combination to restart the computer, which can solve most of the black screen problems.

Method 2: F8 is correctly configured for the last time.

If you can't solve the problem after trying to restart, then turn off the computer first, and then when you turn it on, Qingyuanwu keeps pressing the F8 key to enter the system operation, and select the last correct configuration to try to solve the black screen. This can effectively solve the problem of black screen caused by driver conflicts or system poisoning.

Method 3: System Restore (suitable for operations where the computer has a backup restore point).

1. First of all, keep pressing the F8 key to enter the system operation when turning on the machine, and select the safe mode to enter. (If you are entering the win10 system, please refer to: introduction to the method of forcing the win10 security mode).

2. After entering the safe mode, click all programs, accessories, system tools, system restore, and the system restore dialog box appears, click to restore the system, and restore to the black screen problem when it can be booted normally before the reputation liquid can be restored.

Method 4: Reinstall the system.

How to adjust the contrast ratio of a laptop:

1. Open the control panel of your computer and click on Appearance and Personalization on the right.

2. Click on the heading "Display" on the right.

3. Click "Calibrate Color" on the left menu bar.

4. Enter the color calibration page.

5. Adjust the gamma value, and adjust the value to the lowest when the display effect is the best.

6. Color and contrast adjustment is directly skipped, the notebook itself has a shortcut key to adjust the brightness, and the notebook screen is not like the peripheral display that can adjust the contrast separately.

7. Adjust the color balance.

2. You can try to connect the external screen to see if the output of the graphics card is normal, if the external screen can be displayed normally, it means that there is a problem with the computer screen or cable, and it is recommended to send it to a repair shop for repair.

3. The boot screen is black, the system has a sound, the external screen is abnormal, it may be that there is a problem with the graphics card or motherboard, you can open the laptop shell, remove the dust inside, or send it directly to the repair shop for maintenance.

4. The screen is light, and the cursor flashes in the upper left corner, which is a black screen of the system, and it is recommended to make a U disk to start the disk and reinstall the system.

The above are some common causes that cause the laptop to boot up black screen and solutions, I hope it can help you.

Computer: Lenovo Y70002022

System: Windows 10

The steps to repair the black screen of the laptop electric key limb brain are as follows:

1. Press any key on the keyboard to see if it recovers.

2. If the screen is on, it means that the screen off time is too short, and the user can use the keyboard combination shortcut key Win+I to open the Windows settings window.

3. Click the system option to open, find the power deficit and sleep in the left list, find the screen and sleep in the right pop-up option, and set it to never repair.

4. Or open the control panel, find Hardware and Sound Power Options Change the schedule settings, and set the time to turn off the monitor.

5. If it doesn't light up, find the fn key and f7 key on the keyboard, and press it at the same time to open the computer screen. <>

Laptop black screen issues can be caused by a variety of factors, such as hardware failure, power supply issues, software conflicts, or mishandling or mistakes. Before fixing it, we need to analyze the specific cause of the black screen and take corresponding measures to fix it.

Here are some common black screen issues and how to fix them:

1.Power failure: Check that the laptop's power cord is well connected and has power, try replacing the power adapter.

2.Hardware failure: If your laptop's key beeps or has an error** when it starts, it could be a hardware failure, such as a memory, hard drive, graphics card, etc. It is advisable to take your laptop to a professional repair shop for repair.

3.Graphics card driver issues: If your laptop has a black screen when it starts up, it could be a problem with your graphics card driver. You can uninstall the graphics driver and reinstall the latest version of the driver after entering safe mode.

4.Operating system issues: Back up your data from time to time, and you can do a system restore or reinstall the operating system. If none of the above measures solve the problem, it is recommended to take the computer to a professional repair shop for repair.

5.Other: There are some other factors that can cause the black screen issue, such as virus infection, local software conflicts, etc. At this point, you can fix the problem by installing the software or reinstalling the software.

In conclusion, if the laptop black screen issue occurs, you first need to analyze the specific cause and take corresponding measures to fix it. If it can't be solved, it is recommended to find a professional computer repair shop or technician for help.

Causes of the black screen failure of the computer at startup:

Second, the oxygen cavity of the memory strip, the oxidation of the graphics card, the power supply problem, the motherboard battery problem, the CPU does not work, etc.

Fault Analysis and Troubleshooting:

1. For repairing the fault of the black screen of the computer, the principle of soft and then hard must be the first thing. It is to first troubleshoot the black screen caused by the operating system and application software, and then find the cause from the hardware. When the computer has a black screen failure, the first thing to see is whether there is a problem with the operating system?

Or you have installed software with viruses or Trojan horses, resulting in a black screen and crash on your computer. If the computer can reinstall the system, and after reinstalling the system, the computer returns to normal display of the desktop, then it is a problem with the software.

Second, the principle of peripherals first and then host. Check the problem of poor contact of external equipment, such as: the power cable of the display, the signal cable of the display, the power cable of the host, and whether the signal cable of the host and the display are connected firmly.

3. Use the plugging method and replacement method to check for hardware failures. Unplug the memory and graphics card first, wipe the gold finger of the memory and graphics card with an eraser, and then reinstall it back to solve the problem of poor contact between hardware. The substitution method is to plug the suspected faulty part into a good computer and test it, and if you can use the part, it is good.

If it can't be used, the problem lies in this part, just replace it with a good one.

Fourth, use the minimum system method to eliminate hardware failures. The minimum system method is to keep only the most basic hardware working environment, unplug all other hardware, and then turn on the computer to see if it can boot.

First of all, try the following exercises: remove the battery and power adapter, press and hold the switch button for 30 seconds to discharge the static electricity, wait for about 15 minutes, and then connect the power adapter separately to power on; If it can't be turned on yet, it is the following reasons.

1) The first reason is that the power adapter of the notebook is damaged and cannot be powered on, or the battery of the notebook is out of power, and it cannot be turned on from the surface to the black screen. Solution: Replace the power adapter or fully charge the battery.

2) The first two reasons for the early dust: the boot circuit of the notebook motherboard is faulty, such as clock, reset, power supply, MOS tube, etc., which may cause failure to boot, black screen, i o problems, and unable to start the computer, black screen, etc., treatment method: send it to the after-sales service or repair shop to repair the motherboard, 3) The third reason:

That is, the video memory of the notebook graphics card is soldered, the performance of the main chip is reduced, the graphics card BIOS is disordered, and the control power supply IC is problematic, which will cause the graphics card to fail to work normally, that is, the graphics card is broken, because the graphics card is broken, it will naturally not be able to boot, and the screen will be black.