First of all, to determine whether it is a true black screen or pseudo-black screen (that is, the screen backlight is not there, look carefully and still see the screen words, with a flashlight to see) if it is a pseudo-black screen is generally bad lamps, you need to change the lamps. The real black screen is more than the graphics chip problem, if it is NVIDA graphics card door chip, including integrated graphics card to completely solve the problem to change the new and improved version of the graphics card chip, or certainly recurrence, if not the graphics card door chip, such as ATI only need to add welding on it.
Notebook failure obligation to answer, everyone to help everyone, no need to be polite. Baidu Hi directly ask or user information on the phone to ask the button to consult can be. The provinces can help guide the attention of the problem, Beijing can directly find me.
2. If the computer black screen how to do
When you turn on the computer, after a few minutes after the image does not appear.
At this point, you should first see if the power indicator on the monitor panel is on. If it doesn't then check if the monitor's power plug is connected.
If the power cord is plugged in well (to ensure that the power outlet has power, you can change a jack to try), and the power switch is on, but the monitor indicator does not light up, which indicates that the internal circuitry of the monitor is faulty, which should be sent to a specialized maintenance department for repair. If the monitor's power indicator is on, you should restart the computer and pay attention to whether the host's indicator light is flashing, whether the host has a "beep" sound.
If there is, the computer has started normally. At this point, you should check whether the signal cable connection between the monitor and the host computer is normal, and whether the 15-pin D-plug connected to the host computer is loose, and whether the pin in the plug is broken, crooked, and short.
If the connection is normal (if you have the conditions to change a monitor to try, or change a host to try, whose faults immediately see, because of which there is a graphics card failure), that the monitor internal faults, should be sent to repair. Currently the monitor are energy-saving, according to the host to send the line field synchronization signal automatically work in the appropriate state and mode, the panel lights at the same time to indicate the corresponding state.
Usually orange blinking - shutdown or sleep, orange - hang, yellow - wait, green - normal display. When your monitor black screen, after your careful inspection is not the host's fault, then it is best not to continuously or for a long time to the monitor power, so as not to expand the fault.
3. How to do computer black screen
There are various reasons for the failure of the computer black screen, such as monitor damage, motherboard damage, graphics card damage, poor contact with the graphics card, power supply damage, cpu damage, etc. First of all, check whether the contact is good.
You can check whether the contact between the graphics card and the monitor is good, and whether the contact between the graphics card and the motherboard I/O slot is good. If necessary, you can remove it and reinstall it once to ensure that it is installed in place and has good contact. If there is no problem with the contact, it is best to try a different monitor in order to make sure that there is no problem with the monitor.
If there is no problem with the monitor, check whether the cpu fan is running, such as running, use a multimeter to measure whether the voltage output is normal ±12V, ±15V, if not normal, you can change 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 stick, the cause of the failure can be limited to the cpu, motherboard, memory in the three.
Generally, if the memory is faulty, there should be an alarm sound. If you exclude the memory failure, only the cpu and motherboard.
Change a normal cpu (should be compatible with the computer detected), boot to re-test, such as still appear black screen, can only change a motherboard, the problem should also appear on the motherboard. The computer black screen failure may indicate that the computer has a more serious problem, may be in the black screen phenomenon according to the above method to be eliminated.
In the process of processing should be flexible to apply the exclusion, replacement method, for the timely emergence of the phenomenon to be excluded from processing.
4. What to do when your computer turns on a black screen
Discharging the BIOS battery (restoring the BIOS factory defaults) is recommended to plug in the graphics card, memory, clean up a bit of hygiene, and polish the gold finger of the graphics card, memory.
The troubleshooting method of the computer boot without display (see if there is a drum capacitor). Step 1: First check the computer's external wiring is connected, the various wires re-inserted once again, to see if the fault is eliminated.
Step 2: If the fault remains, then open the main chassis to see if there is any excess metal in the chassis, or the motherboard deformation caused by short-circuit, smell the chassis with or without the burning of the paste, the motherboard with or without burned chips, the CPU around the capacitors with or without damage. Step 3: If not, proceed to clean the dust on the motherboard and then check if the computer is normal.
Step 4: If the problem persists, next unplug the Reset cable and other switches and indicator wires from the motherboard, and then short-circuit the switches with a screwdriver to see if you can turn on the computer. Step 5: If you can't turn on the computer, then use the minimal system method to unplug the hard drive, floppy drive, and optical drive cables, and then check whether the computer can be turned on, and if the computer monitor appears to turn on the screen, then the problem is in these devices.
Then one by one to the above several devices into the computer, when access to a device, the fault reappeared, indicating that the failure is caused by this device, and finally focus on checking this device. Step 6: If the problem persists, the problem may be caused by memory, graphics card, CPU, motherboard and other devices.
Then use the plug and swap method to check whether the memory, graphics card, CPU, and other devices are normal, and if there is a damaged device, replace the damaged device. Step 7: If the memory, graphics card, CPU and other devices are normal, then the BIOS will be discharged, using the isolation method, the motherboard will be placed outside the chassis, connected to the memory, graphics card, CPU, etc. to test, if the computer can be displayed, and then install the motherboard into the chassis to test until the cause of the failure.
If the problem remains, you need to return the motherboard to the manufacturer for repair. Step 8: computer boot no display but there is an alarm sound, when the computer boot boot, the system BIOS began to POST (power self-test), when a computer is detected in a fatal error in a device, it will control the speakers to send out a sound to report the error.
So it is possible to have a failure of booting without displaying the alarm sound. For the computer boot no display with alarm sound failure can be based on the meaning of the BIOS alarm sound, to check the faulty device, in order to troubleshoot.
The diagnostic methods for various kinds of failure to start the operating system are as follows: First, check whether the computer has begun to start the operating system when the computer is turned on. If the operating system in the start-up crash, blue screen or automatic reboot, it means that the hard disk partition table and the main boot record is normal, to rule out the hard disk partition table damage, hard disk main boot record damage, hard disk partition end flag loss and other fault reasons.
Then use the following method to diagnose. Step 1: First, start the computer in safe mode to see if it can start, if it can not start, it may be infected with a virus, the system files are lost, the operating system is damaged, the hard disk has a bad channel, the hardware device has a conflict or hardware problems, go to step 4; if you can start the safe mode, it may be incompatible with the hardware driver and the system, the operating system has a problem or infected with a virus, etc. caused.
Step 2: Then run the antivirus software, if there is a virus, it may be caused by a virus, kill the virus and restart the computer, if it is still not normal, then you need to reinstall the operating system. Step 3: If no virus is detected, you can use the operating system comes with the "System Restore" function, the system will be restored, after the restoration of the system if the system is normal, the failure is caused by system damage.
If the problem persists, it may be caused by incompatibility between the device driver and the system; then remove the drivers for the sound card, graphics card, network card, and other devices, and then install the drivers one by one, restarting the computer once for each device, to check which device driver is causing the problem, and then download the new version of the faulty device driver, and then install it. Step 4: If you can't boot from Safe Mode, then reinstall the operating system using the installation CD.
If you can install the operating system normally, go to step 7; if there are failures when installing the operating system, such as crashes, blue screens, reboots, and so on, resulting in the inability to install the system, it should be caused by faulty hardware or poor hardware contact. Step 5: Then clean the dust in the computer, clean the memory, graphics card and other devices gold finger, reinstall the memory and other devices, and then reinstall the operating system, if you can install the system normally, it is a fault caused by poor contact.
Step 6: If you still can't install the system, the failure may be caused by hardware problems. Next, use the replacement method to check for hardware failures, and replace the hardware when you find it.
Step 7: If you can install the operating system normally, and the fault disappears after installation, the fault is caused by the corruption of system files. Step 8: If the failure persists after installing the operating system, it may be caused by a bad hard disk or incompatibility between the device driver and the system.
Start the computer in Safe Mode, if it does not start, then the hard disk has bad sectors caused by the failure. Then you can use NDD Disk Utility to repair the bad sectors.
Step 9: If you can start the safe mode, it is caused by the incompatibility of the device driver with the system. Then remove the sound card, graphics card, network card and other devices, and then install the drivers one by one, installing one to boot once, to check which device's driver is causing the failure.
After finding out, download the new version of the driver for the defective device, and install it.
The driver can be installed on any device that is not working.
5. What is the reason for the laptop dark screen
If it is a pseudo-dark screen or splash screen is generally a bad lamp, you need to change the lamp (that is, there is no screen backlighting, and you can still see the screen words when you look closely).
The lamp is aging, similar to fluorescent tubes, aging, sometimes every time you switch the lamp can be bright for a while. If the external did not show that the high-voltage board of the problem is relatively large It is best to check the high-voltage board if the background has a bright light or all black is the problem of the graphics card If in Tianjin Nankai District, Anshan West Road, Yigao Digital Plaza, first floor, a-142 easy to repair laptop repair Reputation is very good is a chain store Baidu Baidu Tianjin easy to repair laptop repair can be contacted them Good luck to you Anshan West Road address: 633;638;638;638 District 638 District; 640; 640; 687; 687; 705; 705; 705 District; 847; 847; 849; 849 Baidu map.