may cause a lot of reasons
black screen causes
1, computer host failure
(1) host power supply caused by the failure
host power supply damage or host power supply poor quality caused by the black screen failure is very common. For example, when adding some new equipment, the monitor will appear after the black screen failure, exclude the quality of accessories and compatibility issues after the power supply quality is not good enough power is the main cause of the failure, this time may also be heard in the machine speakers continuous alarm 12, replace the high-power quality power supply is the best solution to this type of failure. In addition, some motherboards have AT/ATX dual power supply interface, the selection of jumper settings are not correct can also cause such a failure.
(2) the quality of accessories caused by the failure
Poor quality or damage to computer parts, is the main cause of the monitor black screen failure. For example, the motherboard (and the motherboard's CMOS), memory, display card and so on problems may certainly cause the appearance of black screen failure. Failure of the performance of the monitor lights in orange, then replace the display card, memory, and even the motherboard, CPU try, is the fastest solution
(3) the quality of the connection between the accessories
Memory graphics card and so on with the motherboard between the insertion of the incorrect or loose resulting in poor contact is to trigger the main cause of the failure of the black screen. And the display card and monitor connection problems may also trigger this kind of failure, until the AT power supply is not correctly plugged in or even more so, such as hard disk or optical drive data line reversal may also trigger the start of the black screen failure.
(4) Black screen failure caused by overclocking
Overclocking or overclocking parts that are not suitable for overclocking will not only cause black screen failure, but also cause damage to the accessories in serious cases. The most important thing to remember is that you can't just overclock or overdrive your system, but you can also overdrive your system by using a fan that's damaged and not spinning at all.
(5) other reasons for the black screen
Others, such as the motherboard CMOS settings are incorrect and the motherboard to clear the CMOS jumper incorrectly can be caused by the black screen failure, which can be compared to the motherboard instructions to change its settings. In addition, software conflicts such as driver problems improper installation, DIY improper such as BIOS refresh error, power management settings are incorrect, malicious viruses caused by hardware damage (such as CIH) and so on may cause the monitor black screen failure. You may want to think more carefully when encountering this type of failure to consider the causes of the failure to do to solve the problem know yourself and know the enemy with half the effort.
(6) If the floppy drive has a floppy disk
If the floppy drive has a floppy disk, a lot of times it will cause the computer to boot or restart, the computer will appear black screen, and can not enter the system. To avoid this kind of situation you can also cancel the floppy disk startup item in the BIOS.
2, the monitor itself fault
(1) AC power supply power
External power supply power, resulting in some of the old monitor or some of the power-consuming power of the monitor can not be normal startup, is the monitor itself fault caused by one of the causes of the black screen failure. Or external power supply voltage instability, too high or too low may cause the monitor does not work.
(2) power switch circuit damage
The display switch circuit failure is the main cause of display black screen failure. Simple such as power switch damage such as internal short circuit, common such as switch tube damage or damage to its peripheral circuit components and so on.
(3) Damage to the line output circuit.
The failure of the line output circuit or tube and its power supply circuit is also the main cause of display black screen failure. In particular, the damage to the high-voltage packages in some of the use of years or poor quality miscellaneous monitors caused by no display black screen failure is more common.
3, poor graphics card contact
1. The monitor "black screen" and the power indicator does not light up this type of failure is mostly for the monitor itself. First of all, you should check whether the monitor power cord is connected, the power plug and 220V AC socket is in good contact, the monitor power switch is open. After confirming the 220V AC power correctly sent to the monitor inside, can be determined as a monitor failure. 2. monitor "black screen" and the power indicator light this kind of fault phenomenon is more complex to locate, the fault may occur in the monitor, display card, motherboard or signal cable and other parts. Detection of the first adjustment of brightness, contrast knob, observe the screen with or without dark and light changes, to rule out the brightness, contrast off dead and "black screen" phenomenon. If you adjust the brightness, contrast knob screen is still "black screen", you should check the host to the display signal cable is plugged in well, there is no broken head, broken line failure; in the confirmation of the signal cable is intact, POST (POWER ON SELF TEST power-on self-test) detection. POST test is a computer each time the power switch is turned on, it will automatically start the implementation of the POST diagnostic program to detect the normal or not of the computer system components of the process. Once a problem is detected during the test, an error message or a series of beeps are provided to the operator. In the monitor "black screen" this fault, POST detection of the screen information people can not see, but through a series of beeps to determine the location of the problem. 3. A long, two or three short beeps This signal (may be repeated) indicates that the display card has a problem, you should turn off the host power, open the chassis, check the display card and the expansion slot is in good contact. If you suspect that the expansion slot problem, you can use the plug method to replace the display card where the expansion slot to eliminate. If the fault is still not eliminated, the display card can be replaced with other matching microcomputer check, if other microcomputer card for the "black screen", the fault is judged in the display card; if the display card in other microcomputer work properly, the fault is on the motherboard. 4. two short beeps this failure may be in the motherboard and display card or monitor itself (very unlikely). Turn off the power, disconnect the monitor, remove the display card, restart the system. If the two short beeps still exist, the problem is in the motherboard, the motherboard should be repaired. However, if the sound becomes one long and one short, then perhaps the correct POST process noted that the display card does not exist and the power should be turned off and the display card reinstalled, but not connected to the monitor. Reboot the system, if the two short beeps signal is still present in POST, the display card is faulty: but if only one short sound is heard, the display card is good, it is the monitor itself that is causing this error signal, and the monitor should be serviced. During the period when the monitor is detached from the mainframe and the mainframe is being tested for power-up, make sure that the POST process has power at all times, during which time you can observe the operation of drive A and determine its system function. After the POST process is complete, the Drive A indicator light will be on. When the drive stops, the key DIR A: command, the drive should be rotated again, the indicator light again, which indicates that the system functions normally, the host system board is intact. After the above test can determine the display "black screen" fault parts. [1][2][3]
4. Genuine authentication black screen
(1) Cause On October 15, 2008, Microsoft China announced that it would simultaneously launch two important updates - Windows Genuine Value-Added Program Notice ("WGA Notice") and Office Genuine Value-Added Program Notice ("WGA Notice") - from October 20, 2008, and that it will be available to all users. ("WGA Notice") and Office Genuine Value-Added Program Notice ("OGA Notice"), which are designed to help users to identify whether the Microsoft Windows operating system and Office applications installed on their computers are licensed genuine software, and thus to help users who unknowingly install and use pirated software to protect themselves from infringement. users who unknowingly install and use pirated software. This new WGA notification is a new round of Microsoft's ongoing WGA program, targeting only users of Windows XP Professional Edition, to help users verify whether the Windows XP installed on their PCs is genuine and properly licensed. The OGA notification is Microsoft's first release for Office users in China, covering all users of Office XP, Office 2003 and Office 2007 suites. Both WGA Notification and OGA Notification are optional services. Users can choose to download and install through the Microsoft Update site or Auto Update, and then go through a verification process to find out if their Windows XP or Office products are genuine and licensed. Users who pass the verification process can use Windows XP or Office programs directly. Users who do not pass the validation process for different reasons will be notified accordingly. For example, if the product is not activated or if you are using a trial version, the validation will fail if the product is not activated; if the validation cannot be completed due to synchronization timeout; or if the validation fails if the product is not genuine.
(2) Black screen condition
Screenshot of black screen for users who did not pass the authentication of Windows XP (18 images) ① If Windows XP users did not pass the authentication, there will be a black screen - After users boot into the system, the desktop background will be pure black, and users can reset their desktop background, but the desktop background will change back to black every 60 minutes. -When the user logs in, he/she will see a dialog box of interrupted login, and a permanent notification and continuous reminder will appear in the lower right corner of the screen showing "You may be a victim of software piracy" and other reminders. ②Black screen if Office user is not authenticated - A pop-up dialog box will be displayed for the first 1-14 days to remind that the Office software running is not genuine. Customers will receive a dialog box reminder once a day when they first open the Office software and once every 2 hours thereafter. -Starting on day 15, the dialog box will continue to appear informing the user that if no action is taken, a visual flag will be added to the Office software after 14 days (i.e., after the 30th day following the failed validation). -After 30 days, a visual marker will be added to the menu bar of the Word, Excel, PowerPoint and Outlook programs in the Office software to remind the user that the copy of the Office software is not genuine.
(3) The solution
The most fundamental solution is to install Microsoft's genuine software, and if you are unable to do so immediately due to the conditions, the following methods are for reference only in case of emergency.
5. "Black screen Trojan horse" caused
"Black screen" Trojan horse tampered with the computer system startup items, indirectly start other malicious programs to change the home page, pop-up ads and theft, antivirus software kills the Trojan horse only and does not repair the computer system. The first step in the process is to create a new, more efficient, and more effective way to improve the quality of life of the people who use them.
(1) The solution
By editing the registry, Winlogon's Shell value is restored to Explorer.exe; or with the help of security software, you can fix the system failure while cleaning up the "black screen" Trojan horse thoroughly.
Edit this section Fault checking
The first situation
If there is no power supply check the PC power supply power connector and power cord to power up the situation 1. Check the chassis power connector and power cord, whether it is intact. If the interface and power cord is broken and fractured should be replaced in a timely manner 2. Check the motherboard power cord socket. If there is no damage, the socket will be pulled out and then inserted. Generally can be solved, due to poor contact with the motherboard resulting in the absence of electricity 3. Check the switch on the chassis power supply to see whether it is connected to the motherboard correctly. Check the jumper on the motherboard, find the jumper to control the power supply, try to shorten the jumper pin, if the motherboard can operate normally, which means that the jumper has a problem. This is mainly due to poor contact between the jumper pin and the jumper cap. Shortening the jumper pin can make the two completely coupled.
The second situation
Electricity has a display but still black screen 1. Check all the cards, graphics cards, sound cards, etc., CPU, memory sticks are installed in place, whether the contact is good, the more stupid way, that is, they ***, and then re *** go. Check whether all interface cards and interfaces are in good contact. The advantage of dealing with the black screen in this way is that, one by one to eliminate the problem, rather than kill a thousand, not to miss a is the purpose of checking the problem. 2. If the problem is too serious, you have to use the most cruel trick, pull out all the minor original parts. Disconnect all secondary power cables, including IDE floppy drives and other devices. All that is needed is the most basic initial boot, self-testing screen memory data. Motherboard, CPU, RAM, video card, etc. If the self-test passes. Add the other components item by item, adding one will self-test once. If the self-test can not pass, we have found the problem, is not installed correctly or incompatible with the problem will be solved. General checking steps: 1. Open the chassis, first check the BIOS reset pin. 2. 2. Insert only one memory, try several times, usually memory problems. Memory problems are not necessarily self-test alarm, it is best to borrow a good memory to try, or insert the memory to a friend's machine to judge. 3. startup floppy drive, hard disk indicator does not light up the motherboard may be bad. 4. Memory self-test through, floppy drive, hard disk indicator light, not start. Restart the machine, press the F8 key to see if you can enter safe mode, can be a good thing, the system restore can be. Can't use DOS floppy disk to start, see if you can enter the hard disk, can enter, see if you have done GHOST clone backup, some machines are good from the factory, can't get into the hard disk format reinstallation of the system.
Edit this troubleshooting
For the computer black screen processing basically using a combination of elimination, replacement method, the principle should be based on the first replacement of the most suspicious parts of the elimination. For ordinary computer users, the lack of professional knowledge, you can analyze the cause of the failure according to the following steps, so that you can do it yourself troubleshooting. First check whether the contact is good. Can be checked separately between the graphics card and the monitor contact is good, the graphics card and the motherboard I / O slots between the contact is good, if necessary, can be removed, reinstalled once to ensure that the installation is in place, good contact. If there is no problem with the contact, it is best to try a different monitor to make sure that the monitor is not a problem. If there is no problem with the display, see whether the cpu fan is running, such as running, with a multimeter to measure the voltage output is normal ± 12V, ± 15V, if not normal can be changed to a power supply to try. If there is still a black screen, then take out the components installed in the computer, leaving only the cpu, graphics card, memory sticks, the cause of the failure can be limited to the cpu, motherboard, memory among the three. Generally if the memory is faulty, there should be an alarm sound. If memory failure is ruled out, there is only the cpu and motherboard. Change a normal cpu (should be compatible with the computer tested), boot to re-test, such as still appear black screen, can only change a motherboard, the problem should also appear on the motherboard. Computer black screen failure may indicate that the computer has more serious problems, may wish to black screen phenomenon in the above method to be eliminated. In the process of processing should be flexible in the application of exclusion, replacement methods, for the timely emergence of the phenomenon to be excluded from processing. 1. When the monitor black screen without image display (but the market monitor in the host does not send a signal, the screen will display "no signal line connection"), first check whether the host power supply is plugged in well, the power supply fan is rotating? Host panel power indicator, hard disk indicator is flashing whether bright? Because if the host power supply does not work or the motherboard is not powered, the monitor does not receive the signal, of course, there will be no image display. 2. And then check the monitor power supply is plugged in well? If your monitor's power switch is a light touch switch, when the monitor is powered, you should hear a slight "ping pong" sound, then you can judge the monitor's switching power circuit is good. Is the power switch of the monitor turned on again? Is the monitor's power indicator light on? When the hand close to the monitor screen and slowly move whether there is a "sizzling" sound, at the same time, the sweat of the hand has been sucked up the feeling, which is to check whether the monitor high-voltage circuit is working properly. 3. If you are sure that the monitor has been charged, and high pressure generation, continue to check the monitor's data line connector and the signal output interface of the graphics card is in good contact? Is there loose? And then unplugged to check whether the D-type interface is bent or broken pins or a lot of dirt. This is a problem often encountered by many users, when connecting the D-type jack, the force is not uniform, or forget to tighten the interface fixing screws, so that the interface is loose resulting in poor contact, or due to the installation of improper methods or too much force, so that the D-type interface within the broken or bent pins, resulting in poor contact. Note: The display of the data line plug 15 pins may have missing pins, such as 4, 9, 11 pins, which is normal, do not artificially use other wires to supplement these missing pins, so as not to cause other failures. 1. 2, 3 pins for the red, green, blue three-gun signal input, if which pin contact is bad, the screen will have a lack of the corresponding color. If the 12th, 15th pin has a problem, the host can not find the corresponding display, but this does not affect the use. If there is a problem with the 13th and 14th pins, the monitor will have a black screen, and the indicator light of the monitor will change from green to orange after a while of powering on. It is also one of the black screens mentioned above. 4. Open the chassis to check whether the monitor card is installed correctly? Is the contact with the motherboard slot good? Is the graphics card or slot due to the use of too much time and too much dust, resulting in poor contact? Whether the chip on the graphics card has burnt, cracked traces. When the graphics card causes black screen, the computer boot self-test that there is a short four long "beep" sound prompt. When installing the graphics card, hold the upper part of the card with your hand and insert it into the slot with even force, so that the fixed screws of the card and the main chassis screws coincide with the mouth. Do not force the fixing when it is not inserted correctly, causing the graphics card to twist. If you confirm that the installation is correct, you can remove the card and wipe the gold fingers of the pins with an alcohol cotton ball or change the slot (only for PCI cards) to install. If it does not work, you can only change a good graphics card to try. If it does not work, in determining the integrity of the graphics card, but also consider the compatibility of the graphics card and the motherboard. 5. Check other cards (including sound cards, decompression cards, video capture card) and the motherboard slot contact is good? Pay attention to check whether the data cable of the hard disk and the power cable of the hard disk are connected correctly? Replace the slots of other boards and clean the pins. This is often easy for many people to ignore. It is generally believed that the computer black screen is the monitor and graphics card problems, and other equipment has nothing to do. In fact, because the sound card and other equipment is not installed correctly, resulting in the system is difficult to complete the first make, especially the hard disk data cable and hard disk power cable inserted wrong, easy to cause the failure of the display. 6. Check whether the contact between the memory stick and the motherboard is good? Re-plug the memory stick once or try a different slot, or replace the memory stick with a new one. If there is a problem with the memory stick, the computer will have a continuous sharp "beep" sound when starting up. The sound will be different because the motherboard is different. 7. Check whether the contact between the CPU and the CPU holder on the motherboard is good? Poor contact between the CPU and the SLOT1 socket or SOCKE370 socket due to moving or other factors. It is best to press the CPU by hand or remove the CPU and reinstall it again. 8. Check whether the CPU external frequency, multiplier frequency, memory frequency and other jumpers or CMOS settings are correct. Against the motherboard manual, check the relevant jumpers one by one, in the order of "CPU external frequency jumper - CPU multiplier jumper - memory frequency jumper". 9. Check whether the CPU voltage is set properly. Be careful when setting the CPU voltage jumper, make sure it matches the operating voltage of the CPU. Eight and nine of these two steps for some assembly machine or like overclocking users in the black screen to double-check. 10. Check whether the CMOS parameters are set correctly. If your computer is equipped with two graphics cards, set in the CMOS is the first initialization of the PCI graphics card, and the only monitor connected to the AGP graphics card, of course, the monitor will not be bright. 11. Check the host and the monitor requirements of the working environment is consistent? Is the working voltage normal, the ambient temperature is not too high. In addition to the above steps to check, but also according to the working conditions of the computer to quickly locate, such as in the host to open the power supply, you can hear the "beep" that the computer self-test is complete, if the hard disk indicator keeps flashing, it should be in the second to the fourth step of the check. 12. If the monitor in the computer startup process there is content to display, just after loading the screen of WIN98 black screen, it is only WIN98 system software problems. The above check method is based on the monitor itself no electrical faults, that is, after turning on the host power monitor power indicator from green to yellow but the monitor black screen without image display. If you use the above steps, the monitor is still no display, you should ask a professional repair.
Samsung computer black screen can not boot!Dear Samsung users Hello: According to your description, if the laptop is turned on and only displays the mouse, it is recommended that you: 1. Press ctrl + alt + del to start the task manager, terminate the application installed by yourself. If ineffective, long press the boot button 4,5 seconds, the notebook will be forced to shut down, and then reboot to observe whether it is normal. 2. If ineffective, it is recommended to boot the Samsung screen press F8, select the safe mode to enter to observe whether it is normal. 3. If the safe mode can be normal, it is recommended that the safe mode, will be the recent installation of the software uninstalled, and the use of antivirus software to check for viruses. 4. If you can not enter the safe mode Or the above operation is invalid, it is recommended to boot the Samsung screen press F2 to enter the BIOS, and then press F9, select yes, and then press F10, select yes, to restore the default settings of the BIOS to save and exit to observe whether it is normal. 5. If the above method is invalid, you need to back up the important information, the operating system will be reinstalled. 6. If the problem still exists, it is recommended that you bring the device, the purchase invoice and the repair card to the Samsung Service Center for testing and judgment. 7. Samsung Service Center. Samsung service center address: :support-.samsung./support/ServiceLocations.asp Samsung Enterprise Knowledge, to provide you with high-quality solutions, heart to answer your questions, and hope to be able to get your satisfaction rating.
Samsung computer black screen how to do, samsung computer black screen reboot stateIf the laptop appears to boot black screen, we recommend that you:
1. Check whether the power adapter is plugged in properly, and whether the laptop is powered on.
2. If you confirm that the power supply is normal, but the laptop screen does not light up, we recommend that you contact Samsung service center to test the judgment.
Computer crash, black screen, blue screen can not enter the system, usually the system files are damaged, to reinstall the system.
The following two main methods to reinstall the system:
First, the U disk reinstallation system
Preparation: a normal computer and a U disk
1, Baidu to download the "U master" (the old hairy peach, Chinese cabbage can also be), the software to download and install on the computer. The first thing you need to do is to install the software on your computer.
2, plug in the U disk, select a key to make U disk boot (before making, remove all the information, U disk will be formatted), wait for the completion.
3, in the Internet to download a system to the U disk, generally ISO format files, the size of 4G or so (if the computer has a system backup, this step can be omitted).
4, the USB flash drive into the computer to install the system, after the boot has been pressed delete (F12, F2, F9, depending on the computer is slightly different) into the BOIS settings, in the boot item (also written startup) in the first boot device set to USB (or with the word USB item, press F10 to save.
5, enter the PE, select the desktop to choose a key to install the system can be.
Second, the CD-ROM system
Preparation: a system CD-ROM.
1, first insert the CD-ROM, after booting, always press delete (F12, F2, F9, slightly different according to different computers) to enter the BOIS settings, in the boot item to set the first boot device to CD/DVD (or items with CD/DVD), press F10 to save.
2. Enter the interface to install the system, select the one-click install system to the C disk can be.
Samsung computer after the computer is turned on the computer is a black screen, the mouse will not light upis a laptop is best not to repair themselves. If you have a desktop computer, try to re-insert the memory. If you can not pull out the memory to see if the alarm, if there is no alarm sound may be the motherboard or power supply is damaged, provided that there is installed on the alarm speaker. There is a speaker on the motherboard, usually have.
S you MSUNG Samsung computer how to bootNotebook boot method:
After the laptop's power adapter is plugged in, directly press the boot button to open.
(Note: some models of the boot key can not be pressed, you need to fluctuate the slider can)
Samsung computer pseudo-black screenHello:
According to your description:
1. If your machine has is a black screen can not be used normally, please troubleshoot the system and the driver first.
Since you did not provide the detailed model number of the machine, it is impossible to know the information of your machine. If your laptop comes with a genuine pre-installed operating system, and a genuine system backup is still available, we recommend that you boot up your laptop and press F4 to enter the restore interface, and select Restore or Full Restore. (Under normal circumstances, just restore the C disk data, in order to avoid the loss of important data, we recommend that you back up the file)
2. If the problem still exists through the above methods, please bring the purchase invoice, the warranty card and the machine to the Samsung Service Center, the engineers to check the machine and deal with it. You can also call the Samsung service center to inquire about the cost of your closer Samsung service center.
Samsung Service Center Address:
:support-.samsung./support/ServiceLocations.asp
Welcome to Samsung Service Appointment:
:support-.samsung./support
How do Samsung computers power on the computer?The method of turning on the LCD monitor is as follows: 1. Connect the power and signal cables. 2. Press the power button on the LCD panel to turn on the computer. 3. Note: Earlier some models of LCD monitor power button on the back.
Samsung computers turn on with only a mouse, and all the others are blackDear Samsung users:
According to your description, we suggest you try to long press the switch button for more than 5 seconds to force the power off and then turn on the computer. Check if the operation is normal. If the fault remains, please reinstall the operating system, download and install the official driver and software. Or bring the proof of purchase to the regular Samsung authorized repair service center testing and repair.
Evaluation, suggestions and comments, please click: support.samsung. /survey