Urgent! My laptop has a black screen when it is turned on and there is no desktop after it is often

Hello friends, according to your above questions, two questions can be analyzed:

1. System Problems The black screen and no error alarm sound prove that the computer has not been able to detect the graphics card or CPU, or that the graphics card and CPU are not in normal working condition, and the computer cannot detect them.

1.Graphics card black screen failure caused by the burning of the graphics card or poor contact between the graphics card and the slot is very common, generally speaking, whether the graphics card is burned or in poor contact with the agp slot, the system will not light up.

If there is a problem with the CPU, the phenomenon is like the black screen of the reboot after the CPU overclocking fails. At this time, find the same CPU for replacement detection, and carefully check the fragile core part to see if there is any physical damage such as deep and large area of cracks and missing corners.

3.Motherboard If the motherboard fails and does not work normally, it is naturally impossible for the graphics card and CPU to start testing normally. And the most common failures of the motherboard come from several main parts of the motherboard: BIOS, AGP slots, control chips, circuits.

2. Troubleshooting:

After shutting down and restarting, press the F8 key to enter safe mode to fix the system, or select the most recent configuration.

Glad to answer for you, may mine be helpful to you.

According to what you said, it's not easy to judge, you might as well use a one-click restore operation first, if it's still the case, choose to reinstall the system to see, if it's still the case, then you have to consider that there is a problem with the hardware.

You use the disc to boot into the win pe system to see if there is a problem with the system of your hard disk, if not, you refer to the answer on the first floor to see, however, my method should be simple, and hurry up.

It is understood that more than 50% of users have encountered a black screen when the computer is turned on, and the computer has been black, which will not only affect our work, but also affect our moodThe computer keeps the screen black when it is turned onWhat to do? Let's take a closer look:The computer keeps the screen black when it is turned onWhat to do and how to fix the black screen on the desktop after the computer is turned on?

I hope it can give you some help and inspiration!

The computer keeps the screen black when it is turned onWhat to do:

Step 1: When encountering a black screen when the computer boots up, you must first disassemble the computer, then clean up the dust on the motherboard, and then press it to see if the computer is running normally.

Step 2: To check whether the external wiring of the computer is normal, you can replug the wires of various countries and then check whether the computer is running normally.

Step 3: If the screen is still black, you should open the main chassis to see if there are any excess items in the chassis, or whether the motherboard is deformed and short-circuited, and finally, smell whether there is a burning smell, whether there are burned chips on the motherboard, etc.

Step 4: If the fault persists, unplug the reset cable on the motherboard, connect the switch and indicator light, and then change the cone short-circuit switch to see if it can be turned on.

Step 5: If the computer still can't be turned on, then use the minimum system method, unplug the data cable of the hard disk and floppy drive, and then see if it can be turned on.

Step 6: If the fault persists, it may be caused by the fault, graphics card or CPU, so use the plug-and-unplug method, swap method and other methods to check whether the memory, graphics card, and CPU are normal one by one, and if the device is damaged, replace it with a new device.

Step 7: If the memory, graphics card, and CPU are normal, you need to discharge the BIOS, and then use the isolation method to place the motherboard outside the chassis and connect the memory, graphics card, and CPU for testing. If the screen is normal, test the board in the chassis until you find the fault.

Step 8: If the computer has a black screen after booting up, but there is an alarm sound, it means that the computer has entered the BIOS system, carried out a POST self-test, and detected the equipment failure, so the speaker sends out an alarm sound. Therefore, when processing, you can troubleshoot the faulty device according to the meaning of the BIOS alarm sound and let the computer return to normal.

What to do and the relevant knowledge of the solution to the black screen of the desktop after the computer is turned on is introduced here, in fact, there are many reasons for the black screen of the computer to start, when you are testing, you can check the fault one by one according to the text, and deal with it in the right medicine, so that the computer can return to normal.

The true black screen is mostly a problem with the graphics card chip,If it is the chip of the NVIDA graphics card door, including the integrated graphics card, if you want to completely solve it, you must change to a new and improved version of the graphics card chip,Otherwise, it must be **,If it is not the chip of the graphics card door, such as ATI, you only need to add welding。

The common causes of a black screen are: one, the power supply chip is damaged, two, memory problems, and third, BGA (graphics card. North and South Bridge) is caused by the virtual soldering of the packaging chip, and there is also a situation where the screen is dark faulty, and many netizens think that it is a black screen phenomenon. It is recommended that you send it for repair.

I can help you in Beijing.

If you are not in Beijing, it is recommended that you find a reputable and skilled repairer to help you overhaul.

If any indicator does not respond, this is a phenomenon that is not powered on, mostly because the power chip or motherboard has a short circuit and break point.

If the indicator light is on, there are generally two situations, the indicator light does not light up after turning on or just flashes and there is no response, most of which is that the motherboard has a short circuit point or the motherboard's power chip is faulty.

If the indicator light is on after booting, it is generally that the motherboard self-test has not passed, and most of them are problems with the graphics card chip. Notebook fault obligation answer, everyone help everyone, no need to be polite. Hi direct question or user information ** ask buckle consultation is OK.

Those from other provinces can help guide attention to problems, and those from Beijing can come to me directly.

If it is a dark screen, the lamp tube is generally broken, and the lamp tube needs to be replaced (that is, the screen backlight is gone, and you can see the words on the screen if you look closely). The lamp is aging, similar to the fluorescent tube, which is aging, and sometimes the lamp can be turned on for a while every time you turn it on and off.

Closing and turning on is equivalent to turning the lamp on and off once.

If the all-black indicator light is on, or there is a running screen without a graphics card, it is a problem with the motherboard graphics card, on the first floor of Yigao Digital Plaza, Anshan West Road, Nankai District, Tianjin, A-142 Easy Repair Notebook Repair has a good reputation, and it is a chain store Tianjin Easy Repair Notebook Repair You can contact them.

First of all, check the power supply system, if there is no problem, the system is wrong, just reinstall the system.

1. If you look at whether the hard disk light is flashing during the boot process, you can see whether the computer is booting and loading the operating system normally.

2. If you can be sure that the system is loading normally, it means that the machine itself is operating normally. Then it may be a problem with the display, such as poor cable contact.

3. If you don't observe the continuous flashing of the hard disk light, it may also be a power failure, or other hardware problems, resulting in most cases the machine does not start normally at all. I think it's more likely that there will be a power supply problem, because occasionally you can boot up and run normally, but not if there is a problem with other hardware.

Today's notebook power supply is generally a wide range of voltage, which can be used in the domestic 220V and Japanese 110V environments, but there are some that are not, you have to see if you can use it now at 110V, if you don't make it clear that you can use it at 110V, don't use it again. It is difficult to say whether it is the damage to the power adapter or the power supply part of the fuselage.

It's best to send it to the maintenance department for inspection!

It is estimated that it is a problem with the graphics card, you see if it is the case with other displays, if it is also like this, the graphics card is broken, if not, the screen is broken.

There's a problem with the system, and it can't start properly, so it's always a flashing cursor, and let's reinstall a system.

[First, check whether the interface and power cord of the chassis power supply are in good condition.] If the interface and power cord are damaged or broken, they should be replaced in time

1. The lamp may also fail, and the lamp should be replaced within 500 oceans; ps：xian86913

2. There is also a booster plate, or a high-voltage plate failure, which is an element that supplies pressure to the lamp, generally at the bottom of the screen. The maintenance cost is about 200-300; ps：xian86913

3. If the motherboard does not supply power. That is, there is no power supply to the booster plate. The maintenance is about 200-300 yuan; ps：xian86913

4. Then there is the overheating of the machine, which causes problems with the graphics card; ps：xian86913

5. If 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, etc.

If none of the above can be solved. ps：xian86913

Black screen suggestion: Take it to the manufacturer's repair station for free during the warranty period, or find a computer repair company with a good reputation.

There is also a black screen is a problem with computer settings, that is, it can be solved in this way if you don't use the automatic black screen for a long time:

Tap [Start] in the lower left corner of the screen - select [Control Panel] - find [Power Options] - select [Balance] - click [Change Plan Settings] - set the computer to sleep "Never".

However, if you set it up like this, the hard disk will work all the time, which will have a certain impact on the service life of the hard disk.

You unplug the power battery, wait for ten minutes and then plug in the power supply separately to try to turn it on, if any indicator lights are not on, this is the motherboard is not powered on, such as a short circuit break point or a problem with the power chip. If the indicator light is black screen, the real black screen is generally a problem with the graphics card, and it is enough to repair the graphics card to get the heat dissipation. Pseudo-black screen is generally a problem with the backlight system.

If you can turn it on, the next hardware master will look at the temperature, and if the temperature is high, it may be overheating and shut down, and find a good technical handle to dissipate heat.

The black screen at boot may be due to poor memory contact or laptop screen failure.

1. Remove the external power adapter and battery, press and hold the power button for 5 seconds, repeat three times to release the residual charge.

2. Re-plug and unplug the memory of the notebook, replace the slot, and plug in the adapter to boot the test.

3. If the fault persists, test the external monitor. If the external connection cannot be displayed, it is recommended to send it to the service station.

There is a high chance of motherboard failure.

4. If it can be displayed, then the faulty part, generally the backlight board, after the failure, can not provide the voltage or power of the lighting tube, no backlight display, so the screen is dark.

It is recommended to send it to the service station for repair.

Hello, please provide your computer's service code for further verification of your model. The service code of the notebook model is located on a long strip label at the bottom of the fuselage, which consists of 7 digits of English + numbers; A small number of XPS models need to cut out the nameplate at the bottom; Desktop models are mostly located near the backrest of the case.

At the same time, please describe the problems and error prompts in detail, so that you can propose targeted solutions according to your model and problems.

Remove the battery and put it back on.

You can try the following steps to troubleshoot the problem:

1. Unplug all external devices, such as mouse and keyboard, external screen, etc., unplug the external power supply and use the battery to turn on, and confirm whether the hard disk indicator flashes during the boot process and whether it is turned on**.

2. Repeat the above operation, this time plug in the external power supply, remove the battery and boot the test.

The analysis of the test results of the above two items is that if any two of them are in the same state of boot black screen and no boot sound, it may be caused by a motherboard failure.

If there is a boot **, it means that you can enter the system, and the situation may be a failure of the screen itself, a data transmission problem with the screen cable, such as only one of the above two boots** or a successful boot, it means that it is a problem with the power adapter or battery.

3. The boot screen caused by the system, the screen is black in this case, there will be BIOS interface logo, and the cursor will flash in the upper left corner of the screen, even if there is no cursor, the screen will be brighter than if it is not powered on.