If the external display can have a signal output, it can only prove that the display function of the video card or chipset is correct, and does not indicate whether the LCD screen is faulty. After the external monitor is turned on and enters the operating system, press the FN function key and then press the screen switch key to convert the output device. If the LCD screen is not displayed several times, it may be the LCD screen or the signal line. At this time, please carefully observe whether there are images on the LCD screen (although the screen is not bright). If you can see the image vaguely, this indicates that the problem lies in the screen light, the reason for the failure of the screen lamp may be the fault of the high-voltage line package or the failure of the screen lamp itself. If the screen light is not bright and no display is displayed on the screen, it is a problem with the circuit board or the signal line. If you have no electrical engineering foundation or maintenance experience, you can only deliver repairs.
It should have crashed. XP crashes not only include blue screens, but also black screens.
Symptom Analysis: poor contact between hardware, or hardware failure. The related hardware involves memory, graphics card, CPU, motherboard, power supply, etc. The computer must be powered by a power source before being powered on by the BIOS of the motherboard.
Guide self-check, and then pass through the CPU, memory, graphics card, etc. This process is reflected in the screen called self-check. First, the BIOS information of the video card, then the motherboard information, and then the memory, hard disk, and optical drive. If something goes wrong in the middle, the computer will not be able to start normally, or even a black screen.
Countermeasure: First, check whether the external connections and internal connections are smooth. External connections include displays and host power supply. There is a connection between the host power supply and the host Power Supply interface (sometimes poor contact ). The common cause is that the memory of the video card is exposed to dust in the air for a long time due to the usage of the memory. As a result, the oxide layer on the golden finger causes poor contact. In this regard, use cotton to stick a moderate amount of alcohol to wipe the Gold finger back and forth, wait for the dry and insert back. In addition, check whether the CPU is working normally. After the instance is started for about half a minute, manually touch the CPU fan's heat sink to see if the temperature exists. If there is a temperature, the possibility of CPU failure can be basically ruled out. If there is no temperature, sort out the CPU outlet to ensure that the contact is in place. After that, your CPU can be upgraded without the temperature: (in addition to the above method, there is also a mandatory tactic: Clear the patch cord with the method of pulling)
BiOS sets or replaces the CMOS battery of the motherboard .)
The battery is dead, right,
Now you can repair the service without warranty.
Reload the system and try again (remember to back up the data and driver). If the problem persists, it is generally caused by hardware problems. Send it for repair.
The second floor is too strong. Don't worry about splitting the notebook. I haven't seen anything in it.
Hardware problems
First, remove the hard disk and battery.
Next, plug in the memory. It is better to replace other good memory.
In this case, Memory Corruption is very likely.
It may be related to the background light ...... The boost circuit is broken or the lamp is broken. The main board has a hardware fault. There is no other way to deliver repair.
Laptop black screen is generally a problem with the power circuit, or repair it, it is best not to split yourself. May cause poor contact with the video card
Emergency Handling Methods for common computer faults
Transferred from skynet
When using computers, friends may encounter many unexpected faults, which may be caused by software or hardware faults, or other factors ...... So, how should we be able to cope with these incidents for Junior computer users? See the following:
Power failure
& Lt; symptom: displays, hosts, speakers, etc. will be "forced off" in an instant ".
Symptom Analysis: this is caused by a sudden "power failure. Voltage fluctuations generated by the moment of power failure impact computer hardware chips, circuits, resistors, etc. If you are performing disk read/write operations when a power failure occurs, a bad track may occur, or when you are writing a document, data will be lost ......
A proper strategy: select a brand of power supply for computer configuration, so as to minimize the adverse effects of voltage fluctuation on hardware. After a power outage, turn off all power supplies to prevent the display and some ATX power supplies from starting at the same time when the next call is made. This will cause adverse hardware damage. When you use word to edit a document, use the automatic saving function of word. If you operate the disk exactly when the power is down, we recommend that you do not skip disk detection during the next boot to check whether a bad track is generated. Once a bad track is discovered, use tools such as Norton and pqmagic to repair or shield the bad track. In addition, if you are financially authorized, we recommend that you select a UPS instance to provide power-off protection for your computer for a period of time.
Automatic shutdown
Symptom: The system is automatically shut down or restarted when the computer is running normally.
Symptom Analysis: The current motherboard has the CPU temperature monitoring function, once the CPU temperature is too high, exceeds the temperature set in the motherboard BIOS, the motherboard will automatically cut off the power supply to protect the relevant hardware. On the other hand, power management and virus software in the system can also lead to this phenomenon.
Suggestion: if the above sudden shutdown occurs, first confirm whether the CPU cooling is normal. Enable the chassis to visually check whether the fan blade works normally, and then enter the BIOS option to check the fan speed and CPU operating temperature. If a fan problem is found, perform related Dust Removal maintenance on the fan or change the fan with better quality. If you want to eliminate the hardware cause, go to the system and choose "kiss to death" from the installation disc to overwrite the Installation Power Management, and then thoroughly detect and eliminate the virus. When these factors are eliminated, the fault may be caused by the aging or damage of the power supply. This can be confirmed by replacing the power supply method. If the power supply breaks down, it will change to a new one. Do not continue to use it, hardware will be burned out
System host
Symptom: The desktop is locked and the mouse cannot be moved. In severe cases, hot boot (Alt + Ctrl + DEL) fails. There is also the blue screen phenomenon.
Symptom Analysis: the cause of this fault is the bug of the "kiss to death" System and the compatibility problem between various software. It may also be that the user has run too many large programs at the same time, as a result, the process is blocked and the machine is triggered.
Countermeasure: when the host is divided into two types: true and false, the easiest way to distinguish between the two is to press the numlock key in the keypad to check whether the indicator lights have changed. Yes, it is false; otherwise, it is true. If you can press Alt + Ctrl + DEL at the same time and select the program name in the displayed task list, then Mark the items with no response, and click end task. Really, only cold start. For the blue screen, after pressing the ESC key is invalid, Select Restart and press the reset key on the chassis panel. For compatibility issues, you can uninstall the "problem" software and update the motherboard BIOS and related motherboard drivers.
Virus attack
Symptoms ......
Symptom Analysis: virus is essentially a malicious computer program code. The virus uses a large number of copies and runs in the system, occupying system resources, serious damage to software and hardware, such as CIH and hard disk locks.
Solution: the virus uses anti-virus software. If you suspect that your machine is infected with a virus, restart the system to DoS and run the genuine anti-virus software (DOS version) to kill the virus that cannot be killed by "kiss to death; then, start the system desktop and run the Windows version of anti-virus software for anti-virus. On the other hand, some files may be damaged due to a severe virus attack. Before the virus attack, we back up important files to other drives except drive C and set the attribute of the data file to read-only. At the same time, you need to update the antivirus software virus database and use less pirated discs. Those who have already accessed the Internet do not need to download emails from unknown attachments.
System Faults
Symptom: unable to enter the system. A typical manifestation is that the system passes the self-check upon startup and stops at the startup screen.
Disk is
Error and many other phenomena prompted by E.
Symptom Analysis: this is a system fault, which may be caused by many reasons. A common problem is that the system file is modified, damaged, or an abnormal command line is loaded. In addition, hard disk failure is also one of the reasons.
Countermeasure: First, try to enter safe mode. Press F8 at startup and select the third item in the Startup Menu: safe.
Model (security mode ). After entering the safe mode, you can use the Device Manager and System File Checker to find the fault. You can identify the current body and determine whether del or set interruption. You can also reinstall the driver. If the system file is damaged, it can be recovered from the installation file (we recommend that you copy the Windows installation disk to the hard disk in advance ). If you cannot connect to the secure mode, you can use a boot disc or a floppy disk to boot to dos. in DOS, the system files in drive C are completely disinfected and Dir is used to check whether the system files in drive C are complete, if necessary, sys can be performed through a system floppy disk.
C: Restore related basic system files. If no file is found in drive C, you must reinstall the system.
Driver loss
Symptom: the device is displayed in 16 colors when it is started, and the device "XXX" is in use when the audio file is stored.
Symptom Analysis: after eliminating the cause of the virus, this phenomenon often occurs on an old machine that has been used for N months, or when the user has recently moved the components in the host (such as the video card and PCI Card ), this may cause poor contact with the hardware, and the system does not thoroughly detect the relevant hardware.
Solution: reinstall the driver of the video card and check whether the related accessories are in full contact with the motherboard. First, ensure that the Gold finger of the video card and sound card are cleaned, the second is to insert it into the relevant slot when the appropriate force, aligned with the vertical insertion, and then connected to the sound box with the display line. If necessary, you can change the slot location of the PCI Card to avoid resource conflicts with the video card.
Black screen
Symptom: The black screen is not displayed, and an alarm may sound.
Symptom Analysis: poor contact between hardware, or hardware failure. The related hardware involves memory, graphics card, CPU, motherboard, power supply, etc. When a computer is powered on, it must first be powered by a power supply, and then self-checked by the BIOS of the motherboard, and then through the CPU, memory, and graphics card. This process is reflected in the screen called self-check. First, the BIOS information of the video card, then the motherboard information, and then the memory, hard disk, and optical drive. If something goes wrong in the middle, the computer will not be able to start normally, or even a black screen.
Countermeasure: First, check whether the external connections and internal connections are smooth. External connections include displays and host power supply. There is a connection between the host power supply and the host Power Supply interface (sometimes poor contact ). The common cause is that the memory of the video card is exposed to dust in the air for a long time due to the usage of the memory. As a result, the oxide layer on the golden finger causes poor contact. In this regard, use cotton to stick a moderate amount of alcohol to wipe the Gold finger back and forth, wait for the dry and insert back. In addition, check whether the CPU is working normally. After the instance is started for about half a minute, manually touch the CPU fan's heat sink to see if the temperature exists. If there is a temperature, the possibility of CPU failure can be basically ruled out. If there is no temperature, sort out the CPU outlet to ensure that the contact is in place. After that, your CPU can be upgraded: (in addition to the above method, there is also a killer: remove the BIOS settings or replace the motherboard CMOS battery using the jumper method. When all these methods have been tried and all fail, you can summon the Great shrimp brother to help you.
Noisy odor
Phenomenon: You can hear a strange noise or smell a bad smell.
Symptom Analysis: Strange noise may be caused by bad sectors of the hard disk (harsh sound of grid); it may also be the hard disk, the drive screw is not firmly mounted, resulting in the resonance of the chassis. Nose, mostly burnt, very pungent.
Countermeasure: first turn off the power supply. If it sounds strange, open the chassis panel and check it one by one. If it is a bad track, repair or shield it. Be careful with the odor. At this time, you can smell it with your nose, find the component that emits an odor, and then unload it to the computer company for processing. In the middle, you must protect your consumer rights. (If the warranty period is not passed, replace the replacement and repair the repair .) You must never mind this! Because the author's angda optical drive is unable to burn the firewall driver chip to the active drive after the power failure (slow for n seconds), and then he can no longer get the money to find Uncle Js. (If you smell the smell, immediately cut off the power supply, and then open the chassis to find the reason, but do not open the display, can only be handed over to professional repair, it is highly piezoelectric, never joke with your own life.
Transferred from skynet
When using computers, friends may encounter many unexpected faults, which may be caused by software or hardware faults, or other factors ...... So, how should we be able to cope with these incidents for Junior computer users? See the following:
Power failure
& Lt; symptom: displays, hosts, speakers, etc. will be "forced off" in an instant ".
Symptom Analysis: this is caused by a sudden "power failure. Voltage fluctuations generated by the moment of power failure impact computer hardware chips, circuits, resistors, etc. If you are performing disk read/write operations when a power failure occurs, a bad track may occur, or when you are writing a document, data will be lost ......
A proper strategy: select a brand of power supply for computer configuration, so as to minimize the adverse effects of voltage fluctuation on hardware. After a power outage, turn off all power supplies to prevent the display and some ATX power supplies from starting at the same time when the next call is made. This will cause adverse hardware damage. When you use word to edit a document, use the automatic saving function of word. If you operate the disk exactly when the power is down, we recommend that you do not skip disk detection during the next boot to check whether a bad track is generated. Once a bad track is discovered, use tools such as Norton and pqmagic to repair or shield the bad track. In addition, if you are financially authorized, we recommend that you select a UPS instance to provide power-off protection for your computer for a period of time.
Automatic shutdown
Symptom: The system is automatically shut down or restarted when the computer is running normally.
Symptom Analysis: The current motherboard has the CPU temperature monitoring function, once the CPU temperature is too high, exceeds the temperature set in the motherboard BIOS, the motherboard will automatically cut off the power supply to protect the relevant hardware. On the other hand, power management and virus software in the system can also lead to this phenomenon.
Suggestion: if the above sudden shutdown occurs, first confirm whether the CPU cooling is normal. Enable the chassis to visually check whether the fan blade works normally, and then enter the BIOS option to check the fan speed and CPU operating temperature. If a fan problem is found, perform related Dust Removal maintenance on the fan or change the fan with better quality. If you want to eliminate the hardware cause, go to the system and choose "kiss to death" from the installation disc to overwrite the Installation Power Management, and then thoroughly detect and eliminate the virus. When these factors are eliminated, the fault may be caused by the aging or damage of the power supply. This can be confirmed by replacing the power supply method. If the power supply breaks down, it will change to a new one. Do not continue to use it, hardware will be burned out
System host
Symptom: The desktop is locked and the mouse cannot be moved. In severe cases, hot boot (Alt + Ctrl + DEL) fails. There is also the blue screen phenomenon.
Symptom Analysis: the cause of this fault is the bug of the "kiss to death" System and the compatibility problem between various software. It may also be that the user has run too many large programs at the same time, as a result, the process is blocked and the machine is triggered.
Countermeasure: when the host is divided into two types: true and false, the easiest way to distinguish between the two is to press the numlock key in the keypad to check whether the indicator lights have changed. Yes, it is false; otherwise, it is true. If you can press Alt + Ctrl + DEL at the same time and select the program name in the displayed task list, then Mark the items with no response, and click end task. Really, only cold start. For the blue screen, after pressing the ESC key is invalid, Select Restart and press the reset key on the chassis panel. For compatibility issues, you can uninstall the "problem" software and update the motherboard BIOS and related motherboard drivers.
Virus attack
Symptoms ......
Symptom Analysis: virus is essentially a malicious computer program code. The virus uses a large number of copies and runs in the system, occupying system resources, serious damage to software and hardware, such as CIH and hard disk locks.
Solution: the virus uses anti-virus software. If you suspect that your machine is infected with a virus, restart the system to DoS and run the genuine anti-virus software (DOS version) to kill the virus that cannot be killed by "kiss to death; then, start the system desktop and run the Windows version of anti-virus software for anti-virus. On the other hand, some files may be damaged due to a severe virus attack. Before the virus attack, we back up important files to other drives except drive C and set the attribute of the data file to read-only. At the same time, you need to update the antivirus software virus database and use less pirated discs. Those who have already accessed the Internet do not need to download emails from unknown attachments.
System Faults
Symptom: unable to enter the system. A typical manifestation is that the system passes the self-check upon startup and stops at the startup screen.
Disk is
Error and many other phenomena prompted by E.
Symptom Analysis: this is a system fault, which may be caused by many reasons. A common problem is that the system file is modified, damaged, or an abnormal command line is loaded. In addition, hard disk failure is also one of the reasons.
Countermeasure: First, try to enter safe mode. Press F8 at startup and select the third item in the Startup Menu: safe.
Model (security mode ). After entering the safe mode, you can use the Device Manager and System File Checker to find the fault. You can identify the current body and determine whether del or set interruption. You can also reinstall the driver. If the system file is damaged, it can be recovered from the installation file (we recommend that you copy the Windows installation disk to the hard disk in advance ). If you cannot connect to the secure mode, you can use a boot disc or a floppy disk to boot to dos. in DOS, the system files in drive C are completely disinfected and Dir is used to check whether the system files in drive C are complete, if necessary, sys can be performed through a system floppy disk.
C: Restore related basic system files. If no file is found in drive C, you must reinstall the system.
Driver loss
Symptom: the device is displayed in 16 colors when it is started, and the device "XXX" is in use when the audio file is stored.
Symptom Analysis: after eliminating the cause of the virus, this phenomenon often occurs on an old machine that has been used for N months, or when the user has recently moved the components in the host (such as the video card and PCI Card ), this may cause poor contact with the hardware, and the system does not thoroughly detect the relevant hardware.
Solution: reinstall the driver of the video card and check whether the related accessories are in full contact with the motherboard. First, ensure that the Gold finger of the video card and sound card are cleaned, the second is to insert it into the relevant slot when the appropriate force, aligned with the vertical insertion, and then connected to the sound box with the display line. If necessary, you can change the slot location of the PCI Card to avoid resource conflicts with the video card.
Black screen
Symptom: The black screen is not displayed, and an alarm may sound.
Symptom Analysis: poor contact between hardware, or hardware failure. The related hardware involves memory, graphics card, CPU, motherboard, power supply, etc. When a computer is powered on, it must first be powered by a power supply, and then self-checked by the BIOS of the motherboard, and then through the CPU, memory, and graphics card. This process is reflected in the screen called self-check. First, the BIOS information of the video card, then the motherboard information, and then the memory, hard disk, and optical drive. If something goes wrong in the middle, the computer will not be able to start normally, or even a black screen.
Countermeasure: First, check whether the external connections and internal connections are smooth. External connections include displays and host power supply. There is a connection between the host power supply and the host Power Supply interface (sometimes poor contact ). The common cause is that the memory of the video card is exposed to dust in the air for a long time due to the usage of the memory. As a result, the oxide layer on the golden finger causes poor contact. In this regard, use cotton to stick a moderate amount of alcohol to wipe the Gold finger back and forth, wait for the dry and insert back. In addition, check whether the CPU is working normally. After the instance is started for about half a minute, manually touch the CPU fan's heat sink to see if the temperature exists. If there is a temperature, the possibility of CPU failure can be basically ruled out. If there is no temperature, sort out the CPU outlet to ensure that the contact is in place. After that, your CPU can be upgraded: (in addition to the above method, there is also a killer: remove the BIOS settings or replace the motherboard CMOS battery using the jumper method. When all these methods have been tried and all fail, you can summon the Great shrimp brother to help you.
Noisy odor
Phenomenon: You can hear a strange noise or smell a bad smell.
Symptom Analysis: Strange noise may be caused by bad sectors of the hard disk (harsh sound of grid); it may also be the hard disk, the drive screw is not firmly mounted, resulting in the resonance of the chassis. Nose, mostly burnt, very pungent.
Countermeasure: first turn off the power supply. If it sounds strange, open the chassis panel and check it one by one. If it is a bad track, repair or shield it. Be careful with the odor. At this time, you can smell it with your nose, find the component that emits an odor, and then unload it to the computer company for processing. In the middle, you must protect your consumer rights. (If the warranty period is not passed, replace the replacement and repair the repair .) You must never mind this! Because the author's angda optical drive is unable to burn the firewall driver chip to the active drive after the power failure (slow for n seconds), and then he can no longer get the money to find Uncle Js. (If you smell the smell, immediately cut off the power supply, and then open the chassis to find the reason, but do not open the display, can only be handed over to professional repair, it is highly piezoelectric, never joke with your own life.
I met it once because I set the desktop to a pure black background. I didn't expect the entire Screen to be black. I forgot how to fix it.
It takes a long time to use, the temperature is too high, and the system is self-protected.
Symptom Analysis: poor contact between hardware, or hardware failure. The related hardware involves memory, graphics card, CPU, motherboard, power supply, etc. The computer must be powered by a power source before being powered on by the BIOS of the motherboard.
Guide self-check, and then pass through the CPU, memory, graphics card, etc. This process is reflected in the screen called self-check. First, the BIOS information of the video card, then the motherboard information, and then the memory, hard disk, and optical drive. If something goes wrong in the middle, the computer will not be able to start normally, or even a black screen.
Countermeasure: First, check whether the external connections and internal connections are smooth. External connections include displays and host power supply. There is a connection between the host power supply and the host Power Supply interface (sometimes poor contact ). The common cause is that the memory of the video card is exposed to dust in the air for a long time due to the usage of the memory. As a result, the oxide layer on the golden finger causes poor contact. In this regard, use cotton to stick a moderate amount of alcohol to wipe the Gold finger back and forth, wait for the dry and insert back. In addition, check whether the CPU is working normally. After the instance is started for about half a minute, manually touch the CPU fan's heat sink to see if the temperature exists. If there is a temperature, the possibility of CPU failure can be basically ruled out. If there is no temperature, sort out the CPU outlet to ensure that the contact is in place. After that, your CPU can be upgraded without the temperature: (in addition to the above method, there is also a mandatory tactic: Clear the patch cord with the method of pulling)
BiOS sets or replaces the CMOS battery of the motherboard .)
Which of the following statements about inbound traffic _________!!! My laptop has a black screen. I don't need to read the hard disk on the machine. I changed the motherboard. Fortunately, it is a three-year warranty. Black Display
1. when there is no image display on the black screen of the Monitor (however, when there is no signal sent from the host, the screen displays & quot; no signal line connection & quot ;), first, check whether the host power supply is properly plugged in, and whether the power supply fan is turned? Is the power indicator and hard disk indicator flashing on the host panel? Because if the host power supply is not working or the motherboard is not powered, the display will not display images if it does not receive signals.
2. Check whether the power supply of the monitor is properly plugged in? If the power switch of your monitor is a touch switch, When you power up the monitor, you should hear a slight & quot; & quot; sound, in this case, you can determine that the switching power supply circuit of the monitor is good. Is the power switch of the monitor enabled? Is the power indicator of the monitor on? When you move your hands close to the display screen and see if there is a & quot; choppy & quot; sound, and the hair on your hand is sucked up, this is checking whether the high-voltage circuit of the monitor is working properly.
3. If you confirm that the monitor is powered on and there is a high voltage, continue to check whether the data cable connector of the monitor is in good contact with the signal output interface of the video card? Is there any looseness? Unplug the plug and check whether there are bending or broken needles or a large amount of dirt in the D interface. This is a problem that many users often encounter. When connecting the D plug-in, the force is uneven, or the fixed screw of the interface is forgotten to tighten, which causes poor contact, or due to improper installation method or excessive force, the D Interface contains a broken or bent needle, resulting in poor contact.
Note: The 15-pin of the data cable plug of the monitor may have pins such as 4, 9, and 11. Normally, do not manually use other wires to fill these pins, to avoid other faults.
Let's talk about it a little more: the first, second, and third needles are red, green, and blue signal input. If the needle is not in good contact, the screen will have a lack of corresponding color.
If there is a problem with the 12th and 15th pins, the host cannot find the corresponding display, but this does not affect the use.
If there is a problem with the pins 13 and 14, a black screen will appear on the monitor, and the indicator lights will change from green to orange after a while. One of the above black screens is displayed.
4. Enable the chassis and check whether the display card is correctly installed? Is it in good contact with the motherboard slot? Does the graphics card or slot occupy too much dust due to a long usage time, resulting in poor contact? Whether the chip on the video card is burnt or cracked. When a black screen is displayed due to a video card, there is a four-minute prompt when the computer starts the self-check. When installing the display card, hold the upper part of the display card in your hand and insert the card into the groove uniformly. The fixed screw port of the video card is consistent with the screw port of the trunk box. Do not force fixing when the video is not plugged in, resulting in distortion of the video card. If you confirm the installation is correct, you can remove the video card and use an alcohol cotton ball to wipe the Gold finger of the plug-in or use another slot (only for PCI graphics cards) for installation. If not, you can only try another good video card.
If not, consider the compatibility between the video card and the motherboard when you confirm that the video card is complete. You 'd better check the relevant information or ask a netizen.
5. Check whether other boards (including sound card, Decompression Card, and video capture card) have good contact with the motherboard slot? Check whether the connection between the data cable of the hard disk and the power cord of the hard disk is correct? Replace the slots of other boards and clean the pins. This is often overlooked by many. It is generally considered that the computer black screen is a problem with the display and graphics card, and it has nothing to do with other devices. In fact, the installation of sound cards and other devices is incorrect, which makes it difficult for the system to complete the initial operation. In particular, the hard disk data cable and hard disk power cord are inserted incorrectly, which may cause non-display faults.
6. Check whether the memory stick has good contact with the motherboard? Re-plugging the memory stick once, try another slot, or change the memory stick. If there is a problem with the memory stick, when the computer starts up, there will be a sudden & quot; tick & quot; sound. The tone varies depending on the motherboard.
7. Check whether the CPU is in good contact with the CPU seat on the motherboard? Poor contact between the CPU and slot1 plug-in or socke370 socket due to movement or other factors. It is best to manually press the CPU or remove the CPU and reinstall it again.
8. Check whether the jumper or CMOS settings of CPU external frequency, frequency doubling, memory frequency, and so on are correct. Check related jumpers one by one in accordance with the motherboard manual, in the order of & quot; CPU outer Frequency Jumper-CPU multiplier jumper-memory Frequency Jumper & quot ;.
9. Check whether the CPU voltage is set properly. Be careful when setting the CPU voltage jumper, and be sure to match the CPU voltage. The steps 8 and 9 should be carefully checked when black screens appear for some assembly machines or users who prefer overclocking.
10. Check whether the CMOS parameter settings are correct. If your computer has two video cards, you set the first initial PCI video card in CMOS, and your only display is connected to the AGP video card, of course, the display will not be bright.
11. Check whether the working environment required by the host and display meets the requirements? Whether the operating voltage is normal and the ambient temperature is too high. In addition to performing the preceding steps, you can quickly locate the computer based on its working conditions. For example, after enabling the host power, you can hear & quot; done & quot; indicates that the computer self-check is complete. If the hard disk indicator does not stop flashing at this time, check in step 2 to step 4.
12. If the display displays Content During the computer startup, but a black screen appears after the Win98 screen is loaded, this is only a problem with Win98 system software,
The above check method is based on the display itself without electrical faults, that is, after the host power is turned on, the power indicator of the display from green to yellow, but the display black screen no image display. If no display is displayed after the above steps are used, professional service personnel should be requested
He is too tired to take a rest! No.1 is your machine too old!
No. 2 is your power plug unplugged!
No. 3
Are you buying second-hand goods!
If none of them are, send them to the repair site. Don't fix them yourself.
No repair is required!
The computer has been running for too long. The fan on your computer may be faulty and cannot be cooled in time. Is the computer very hot? If it is a fan problem, and it will be enough to use it for a while, because the occasional laptop has also encountered such a problem several times, the computer will not be able to use it for a long time, automatic black screen, it is best to go to the store for repair, to see if there is a problem with the fan! I am not a computer repairer, so I cannot explain the cause to you. I only recommend that you repair it!
This guy upstairs is right ~ I agree ~~~
I have encountered such a phenomenon that my notebook can be turned on and sound
Black screen.
This is because there may be poor contact between the screen and the host.
After the interface is moved, the black screen disappears ~
It takes a long time to use the device. If it takes less than one year for the device to heat up, it should still be in the warranty period. I 'd better find an expert ~~~
HP's gold medal service is very good. If you have time to ask questions, it is better to find someone on-site services quickly. The problem is big. <A href = "http://dl.zhishi.sina.com.cn/upload/35/22/73/1478352273.5461558.gif
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This. width = screen. Width * 0.40 "> </a> I think the laptop will automatically shut down when it is overheated. It must have burned out the hard disk.
Symptom Analysis: poor contact between hardware, or hardware failure. The related hardware involves memory, graphics card, CPU, motherboard, power supply, etc. The computer must be powered by a power source before being powered on by the BIOS of the motherboard.
Guide self-check, and then pass through the CPU, memory, graphics card, etc. This process is reflected in the screen called self-check. First, the BIOS information of the video card, then the motherboard information, and then the memory, hard disk, and optical drive. If something goes wrong in the middle, the computer will not be able to start normally, or even a black screen.
Countermeasure: First, check whether the external connections and internal connections are smooth. External connections include displays and host power supply. There is a connection between the host power supply and the host Power Supply interface (sometimes poor contact ). The common cause is that the memory of the video card is exposed to dust in the air for a long time due to the usage of the memory. As a result, the oxide layer on the golden finger causes poor contact. In this regard, use cotton to stick a moderate amount of alcohol to wipe the Gold finger back and forth, wait for the dry and insert back. In addition, check whether the CPU is working normally. After the instance is started for about half a minute, manually touch the CPU fan's heat sink to see if the temperature exists. If there is a temperature, the possibility of CPU failure can be basically ruled out. If there is no temperature, sort out the CPU outlet to ensure that the contact is in place. After that, your CPU can be upgraded without the temperature: (in addition to the above method, there is also a mandatory tactic: Clear the patch cord with the method of pulling)
BiOS sets or replaces the CMOS battery of the motherboard .) Hardware fault, repair it !!!!!!!!! It is possible that the computer runs too long and the heat dissipation is poor. This may be due to overload of the display.
Exceeds the security value.
For self-protection, the computer may also experience black screen hardware faults.
This is the case with a notebook I used before. It may be due to poor contact, or the reason for screen or motherboard. It is recommended to change one because my notebook is repaired first, the result is invalid. m is the last option. It's okay.
OK
My previous notebook is the same as yours. You should first try to snap off the display to see if it can restore to normal. If yes, it is the poor line contact in it. If your machine is still repaired during the warranty period, I advise you to forget it if you have to spend money on it. After my computer is repaired, it will be changed in less than two months, I spent 300 yuan on it!
It may be overheated.
Please note that the Environment black screen may be caused by a virus or software conflict, but if there is an alarm, it is a hardware problem, or you should repair it in a professional place.
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