What are the reasons for the black screen failure after the laptop is turned on?

First, accidentally deleting system files requires mand for Windows9X startup.

Io. sys, Msdos.

Sys and other files, Quanzhou computer maintenance training school teacher reminded everyone that if these files are destroyed or deleted by mistake, even if all kinds of hardware in CMOS are set correctly, it will not help. Solution: Use the startup disk of the same version of the operating system to start the computer, and then type "SYSC:" to retransmit the system files.

Second, the hardware acceleration setting is too high. Quanzhou computer maintenance training teacher told everyone that hardware acceleration can make the software dealing with a large number of graphics run more smoothly, but if the computer hardware acceleration setting is too high, it may lead to "black screen" phenomenon. To solve the "black screen" fault, please try to reduce the hardware acceleration first.

1. Click the Windows Start menu, click Control Panel, and then double-click Display. 2. Select the Troubleshooting tab, and under Hardware Acceleration, gradually drag the slider from "All" to a position close to "None".

3. Click the "OK" button. Third, CMOS is not set properly. The computer maintenance training teacher in Quanzhou, South China, told us that failures are very common, such as improper setting of hard disk parameters, improper setting of mode, and improper setting of memory parameters, which led to the computer being unable to start.

If the memory without ECC function is set to have ECC function, it will crash due to memory error. .

Laptop computer boot black screen

Friend, you can try,

1。 Press "F8" when starting, enter, enter, enter "safe mode",

Found: "Last time set correctly", press it to try!

2。 Or, find the "Normal Start" mode in "Safe Mode" and press it to try!

3。 If the next boot still doesn't work, I suggest you do a "one-click restore"!

See, this is the way to "restore the system".

It can not only help you repair and restore your computer system,

All files on the disk will be saved:

After the computer is turned on, the "brand" of the computer can not be operated until it is finished!

Press the "one-button rescue" shortcut key on the far right of the keyboard (the+sign on the keypad).

(press F2 or F 1 1 for laptop),

Wait a moment and then press "Deep One-button Restore" or "One-button GHOST".

Wait for the system to "save and copy" all disk files,

(Note: Do not turn off or restart the computer after recovery, and immediately "enter the main platform", that is,

"Desktop", otherwise "all previous efforts are wasted" and "recovery is invalid"!

The computer immediately returned to the "factory state"!

Start downloading "360 Security Guard" and "360 Antivirus Dual Engine Edition",

Start scanning for viruses and trojans,

Fix computer vulnerabilities!

"ex-factory condition": it is the condition when it was just bought.

The software is all there, so there is no need to "reinstall the system", which is much more "worry-free" than reloading!

Or, compare the "manual" when buying a computer with the "restore system"!

The notebook is turned on and enters the desktop black screen.

First, there may be something wrong with the graphics card driver. Press F8 to enter safe mode when turning on the machine.

Second, it may be that Explorer Explorer Explorer is not started. The solution can be to start the task manager first, and then start the resource manager manually, thus solving the problem.

1, the computer starts to enter the welcome screen, but the mouse can move.

2. At this time, you can press Ctrl+Alt+Delete to open the task manager window and select "Apply".

3. Then right-click in the window and select "New Task" from the menu, or press the "New Task" button at the bottom right. The two functions are the same.

4. After confirming the new task, the Create New Task window will open.

5. Then enter "Resource Manager" in the edit box, be careful not to use the ""symbol, and then press the "OK" button below.

6. After the browser explorer is newly built, the wallpaper, icons and taskbar on the desktop are displayed.

What should I do if my laptop is turned on with a black screen?

Computer black screen is actually a common problem.

From my personal experience, half of the assembly machines and laptops appear frequently, with some faults and some setup problems. The solution to the fault is usually:

First, check whether the interface and power cord of the chassis power supply are in good condition. If the interface and power cord are broken, replace them in time.

1, the lamp tube may also fail, so it is probably 500 yuan to change the lamp tube; Ps:xian869 13

2. There is also a booster board, or a high-voltage board failure, which is an element that provides pressure for the lamp, usually at the bottom of the screen. The maintenance cost is about 200-300; Ps:xian869 13

3. If the motherboard is not powered on. That is, no power is supplied to the booster plate. Maintenance is also about 200-300 yuan; Ps:xian869 13

4, then there is the machine overheating, leading to problems with the graphics card; Ps:xian869 13

5, the memory is loose, try to see if the memory of the machine is loose, or you can also see if the hard disk cable is loose.

If none of the above can be solved. Ps:xian869 13

Black screen suggestion: get the factory repair station for free during the warranty period, or find a reputable computer repair company.

Another problem is the black screen set by the computer, that is, if the automatic black screen is not used for a long time, it can be solved like this:

Click Start-Select Control Panel-Find Power Options-Select Balance-Click Change Plan Settings-Set "Let Computer Sleep" to Never.

However, this setting means that the hard disk has been working, which has a certain impact on the service life of the hard disk.

good luck

Personal suggestions are for reference only.

I hope my answer can help you solve the problem.

Why does the laptop screen black when it is turned on? What should I do?

1. Check whether the laptop is sleeping or hibernating.

When the notebook is sleeping or hibernating, and then the notebook is in suspended animation, it will be mistaken for a black screen. So I want to check whether it is in these two States.

Sleep or hibernation belongs to the energy-saving function of turning off the monitor. If the laptop is turned on, but it is used for a period of time or enters a state of low battery power, the system may start sleep state and sleep mode.

You can change the settings for sleep or hibernation, and how to set them:

1) In the blank space of the desktop, right-click to open the drop-down menu and select Personalize.

2) In the lower right corner, select "Screen Saver"

Pop up the screen saver settings tab and enter the power settings in the power management office.

3) In the menu bar on the left side of the power settings, click Change Computer Sleep Time.

4) After entering the settings, change the following time to "Never" and click "Save Changes".

2, boot the black screen but can see the mouse.

This is mainly because some explorer parameters are wrong, so the desktop display part cannot be displayed when the system starts, but the mouse display is normal. In this case, you need to modify the registry by:

1) Make sure that the computer is connected to the keyboard, which can operate the computer. Then press the keyboard Ctrl+Alt+Del at the same time. Select "Start Task Manager" in the list, and the task manager will pop up.

2) Click "File" in the menu in the upper left corner and select "New Task" in the drop-down menu.

3) Enter the Resource Manager and click OK in the Create New Task dialog box that pops up.

Complete the recovery and display of desktop icons.

4) Continue to modify the registry.

Click the "Start" button in the lower left corner of the screen, enter "regedit" in the program and file search box, and press enter to enter the registry, as shown below:

Expand registry options:

HKEY _ Local _ Machine \ Software \ Microsoft \ Windows NT \ Current Version \ Winlogon, (Click the corresponding item with the mouse to expand its subitems and find the corresponding item.

Option, and then find the method of Winlogon item). As shown below:

Find the winlogon item, click it, find the "Shell" item in the list on the right side of the screen, right-click it, and select "Modify" in the drop-down menu, as shown below:

Delete the contents after "explorer.exe" in "Digital Data" in the pop-up "Edit String" dialog box, and click OK to close the registry.

What should I do if my laptop is turned on with a black screen?

Solution of black screen when notebook computer is turned on

Symptoms: the power light is on, the screen is not on, and there is no response. Press and hold the power switch for a long time to restart normally, which means it must be started twice. Solution: Don't lock the touchpad before turning it off, it will be black after turning it off and turning it on again! When the touchpad is turned off and on again, it won't be black, even if the screen is black, don't be afraid. Just press fn+f7 and it will open. This is not a defect at all, and people can keep the touchpad locked after turning it on. If you have an external keyboard, you don't need to lock the touchpad, so there will be no black screen. That's why some people are not black. Don't worry about the black screen, unplug the battery. Don't think about the cause of things before you do something, just turn on the computer twice. Because the second opening is to open the first lock. As long as the computer goes to sleep when it is turned on for the first time, it must go to sleep as soon as the cover is closed in the black battery mode when it is turned on again. Please note that the solution is either to sleep or press Fn+F5 or F7 to turn on the computer.

The laptop goes black when it is turned on.

Is it related to your improper operation before turning off the phone? For example: playing games, watching videos, operating big things, and using computers for a long time? Or download inappropriate things, or delete system files, or shut down. Failure won't happen for no reason, will it?

Press F8 immediately after starting the machine until the advanced options appear. Select Last Known Good Configuration and press Enter to repair it. Now you can't press F8 to enter the safe mode to restore or reinstall the system (if the reinstallation is also a black screen, it is recommended to overhaul. If you can enter the safe mode, it means that you have installed inappropriate things, and all the inappropriate things downloaded before the accident will be uninstalled, or the system will be restored or reinstalled. If your computer is Win8, you can't enter safe mode without entering the system.

If you really can't install the system, you can't install it yourself, so go to the maintenance office and ask someone to help you.

One is to put it away for half a day or one day, and sometimes it will recover itself. The other is to reinstall the system.

As long as you pay attention to your computer, it won't be like this when you turn it on.

Ask me any questions.

Computer boot black screen

Scheme 1: (If you are a non-professional) Try the following scheme to see if you can solve the problem quickly: (1) First, you reinstall the graphics card driver (attached to the CD when you buy the computer) and then restart it to see if there is any change. If there is no change, it's the hardware: (2) It's the poor contact of the wiring spider that deflects the magnetic field of your monitor. Tap twice with your hand to see if there is any response. If there is reflection, it is the problem of deflection of the magnetic field coil. If you know the circuit, take it apart and weld it yourself, but you'd better buy a new one, because the performance after welding may not be as good as before. (3) It may be magnetic bias. Take away the magnetic things around you and try unplugging the input plug. There is another way to deal with the LCD screen of a mobile phone (also moving the screen). Try using a hair dryer. (4) In addition, reduce the refresh rate to a minimum to see if it has any effect. (5) You restore the motherboard parameters to the default values and see if you can solve the problem. Option 2 (if you are a professional): Computer blank screen is a relatively easy phenomenon, especially for some older computers or assembled computers.

There are many reasons for the failure of computer black screen, such as the damage of monitor, motherboard and graphics card, poor contact of graphics card, high temperature of power supply, cpu and parts. There are also some people who create computer blank, such as the main category of genuine Microsoft China 1. Black screen failure caused by computer host failure (1) Black screen failure caused by damage or poor quality of host power supply is very common.

For example, if some new devices are added, the display will have a black screen failure. After eliminating the quality and compatibility problems of accessories, the poor quality of power supply and insufficient power are the main reasons for the failure. At this time, you may still hear the continuous alarm sound of 12 from the internal speaker. Replacing high-power and high-quality power supply is the best solution to this kind of fault. In addition, some motherboards have dual power interfaces of AT/ATX, and the wrong jumper setting can also lead to such failures.

(2) The failure caused by the quality of accessories The poor quality or damage of computer accessories is the main reason for the failure of the black screen of the display. Such as motherboard (and motherboard CMOS), memory, graphics cards and other issues. It will definitely cause a black screen failure.

If the display light is orange, replacing the lower graphics card, memory, and even the motherboard and CPU is the fastest solution. (3) Connection quality between accessories, memory, graphics cards, etc. Incorrect or loose connection with the motherboard is the main cause of black screen failure. Moreover, the connection problem between the graphics card and the monitor may also lead to this failure, until the AT power supply is plugged in incorrectly, or even the data cable of your hard disk or CD-ROM drive is connected backwards, which may also lead to the failure of starting the black screen.

(4) Excessive overclocking leads to the overclocking of black screen failure or parts that are not suitable for overclocking, which will not only lead to black screen failure, but also cause damage to accessories in serious cases. In addition, overclocking or overclocking components are not suitable for overclocking, which will lead to poor heat dissipation, or the cooling fan will not turn when it is damaged during normal use, resulting in the system self-protection crash.

(5) Black screen caused by other reasons, such as incorrect setting of motherboard CMOS and incorrect removal of motherboard CMOS jumper, will cause black screen failure. At this time, you can change its settings according to the instructions of the motherboard. In addition, software conflicts, such as improper driver installation and DIY, such as BIOS refresh error, incorrect power management settings, hardware damage caused by malignant viruses (such as CIH), etc. , may cause the display black screen failure.

When you encounter this kind of fault, you might as well think more and consider the cause of the fault, so as to know yourself and know yourself and get twice the result with half the effort. 2. Black Screen Failure (1) caused by the failure of the monitor itself. The power of the AC power supply and the power of the external power supply are insufficient, which leads to the failure of some old monitors or some monitors with high power consumption to start normally. This is one of the reasons for the black screen failure caused by the failure of the monitor itself.

Or the external power supply voltage is unstable, too high or too low may cause the display to fail to work. (2) The power switch circuit is damaged, and the failure of the display switch circuit is the main reason for the failure of the display black screen.

Simple as power switch damage such as internal short circuit, common as switch tube damage or its peripheral circuit components damage and so on. (3) The line output circuit is damaged.

The failure of line output circuit or picture tube and its power supply circuit is also the main reason for the failure of display black screen. Especially for some inferior brand monitors that have been used for many years, it is more common that the high voltage package is damaged and the black screen is not displayed.

3. Poor contact of graphics card leads to black screen 1. The display is "black screen" and the power indicator light is not on. Most of these failures are caused by the monitor itself. First, check whether the power cord of the monitor is connected properly, whether the power plug is in good contact with the 220V AC socket, and whether the power switch of the monitor is turned on.

After confirming that the 220V alternating current is correctly fed into the monitor, it can be judged that the monitor is faulty. 2. It is complicated to locate the "black screen" of the display, and the power indicator light is on. The failure may occur in the display, graphics card, motherboard or signal line.

When testing, first adjust the brightness and contrast knobs to see if there is any change in the brightness of the screen, so as to eliminate the "black screen" phenomenon when the brightness and contrast are turned off. If the screen of the brightness and contrast knob is still a "black screen", check whether the signal line from the host to the display is plugged in, and whether there is any broken head or disconnection; After confirming that the signal line is in good condition, perform POST.

POST detection is a process in which the computer automatically starts to execute the POST diagnostic program after turning on the power switch every time to detect whether the computer system components are normal or not. When a problem is found in the detection, an error message or a series of beeps will be provided to the operator.

In the failure of the "black screen" of the display, we can't see the screen information detected by POST, but we can judge the location of the failure through a series of beeps. 3. One long beep, two short beeps or three short beeps (which may be repeated) indicates that there is something wrong with the graphics card. Turn off the power of the host, open the chassis, and check whether the graphics card is in good contact with the expansion slot.

If it is suspected that it is an expansion slot problem, it can be eliminated by plugging and replacing the expansion slot where the graphics card is located. If the fault is still not eliminated, the graphics card can be replaced with other matching microprocessors.

The laptop can be turned on, but the screen is not bright.

The laptop can be turned on, but the screen is not bright for the following reasons: 1. Sometimes the laptop is turned on, but the monitor is not on. This phenomenon is generally due to the failure of the motherboard self-test or the problem of the screen light.

2, first of all, we must determine whether it is a true black screen or a false black screen. Pseudo-black screen means that the backlight of the screen is gone, and you can still see the words on the screen if you look closely. 3. If it is a fake black screen, the lamp tube is broken and needs to be replaced.

It is recommended to go to a professional repair shop for repair. If it's still under warranty, there's no need to spend money. 4. If it is really a black screen, it is basically that the graphics card or the south bridge is broken.

You can connect an external monitor, that is, connect the VGA port of the notebook. If the external monitors are the same, it is basically a graphics card. If the external monitor is normal, it is the screen itself or the screen line.

There are 20% possible problems with the screen itself or the screen wiring, and 80% possible problems with the graphics card. Because external output and notebook screen output are two independent output modules.

The graphics card is broken, so it is usually enough to change it. The solution of expanding knowledge that can't be displayed on the computer screen: 1. Not suitable for updating the graphics card driver. It is recommended to reinstall the system for testing.