After asking myself to change the screen, the screen is black but the screen backlight is there

If there is a problem after changing the screen by yourself, in this case, you need to judge the physical phone after on-site inspection. If it is a Samsung phone, it is recommended to send the phone to the nearest service center for testing, and the service center will determine the specific problem, accessories, and whether the phone is within the scope of repair and repair according to the test results**.

Please visit the Service Center page on Samsung's official website.

If the screen of the mobile phone appears black after changing the screen by itself, it is recommended to send the mobile phone to the nearest service center for testing, and the service center will determine the specific problems and accessories of the mobile phone according to the test results, whether it is within the scope of repair and repair**.

Please visit the Service Center page on Samsung's official website.

1.Memory problems When the memory of the mobile phone is insufficient, it will not only slow down the running speed of the mobile phone, but also cause the program that the mobile phone is running to get stuck and black screen. Workaround: Close unnecessary programs; Clean up memory junk.

2.Software Conflict Problem There is a lot of software in the mobile phone market, and many software vendors are incompatible with some software for one reason or another. Workaround:

Uninstall this software and find a replacement software; If you don't know which two software conflict, just delete all the software and install the software you need.

3.Mobile phone poisoning Solution: Install anti-virus software and regularly disinfect your phone.

It's clear that the monitor is broken. There is a backlight, black screen without image solution, first brush BIOS, many displays can be solved, and then check the driver board, and finally the screen is broken......

There are more problems with the driver board, see if the lower cable is loose, whether the voltage from the power board to the driver board is normal, and test whether the main display chip has a short circuit.

If the screen is black, you can restart the computer, press F8 to jump to the advanced startup page. Select "Safe Mode", right-click on the desktop, select "Properties", then click on the "Settings" tab, "Advanced", "Monitor", turn it off when you see "Screen Refresh Rate".

If the monitor is turned off and turned back on, is there a no-signal word?

Or try plugging the monitor to a different console.

It's that the cable is loose, and the wire buckle that connects the screen inside is easy to shake down, and it is recommended to stick it with adhesive tape.

Reasons and solutions for the black screen of laptop boot:

If the notebook is asleep, simply press any key on the notebook to restart it.

Notebook hibernation is when the notebook is at rest. If you don't want the notebook to be asleep, you can make relevant settings, take win7 system as an example, right-click on the desktop, select "Personalization", then select "Screen Saver", click "Change Power Options", "Change Computer Sleep Time", make relevant settings, you can choose "Never".

The boot screen is black, but there is a sound to determine that you can enter the system normally, try to connect the external monitor to see if the graphics card output is normal, if you connect the external monitor to turn on and display normally, it means that it is a problem with the notebook LCD screen or cable.

It may be caused by poor contact, and it is recommended to restart the notebook again. If it still can't solve the problem, it means that the monitor is broken, and it is recommended to go to a repair shop to repair it.

Like the first case, the boot screen is black, but there is sound entering the system, and the external monitor is still abnormal, which may be a problem with the graphics card or motherboard.

You can disassemble the shell, make the interface connector between the monitor and the motherboard tighter, remove the dusty places, and then install the parts of the notebook one by one.

If it can't be solved, it is recommended to restart the computer, keep pressing F8, enter the safe mode, and then disinfect and repair the missing system files. Reboot it again, and maybe it will be solved.

The black screen caused by the system, the screen is black in this situation, there will be a 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.

It is recommended that you can reboot the computer, enter the BIOS, and then select the USB flash drive to boot and enter the PE system. After entering, the system problem will be repaired and anti-virus and other operations.

If you forget to shut down the computer after using the computer for a long time, the computer screen will go black after that. Try plugging it in and maybe the problem will be solved.

Problem analysis: If the computer is powered on (the power indicator is on) but there is no signal or the screen shows "no sighal", it is generally due to poor contact due to loose or oxidized memory modules, or poor contact with the display data cable, or damage to the memory, graphics card, display or data cable.

Handling suggestions:1If the monitor is powered on but no signal is displayed, turn off (if the short press of the power switch is invalid, press and hold the switch until the power indicator goes out or directly unplug the power cord) Power off the case, replug and unplug the memory module, and wipe the gold finger with an eraser in one direction (the back of the thumb fingernail is also fine), if possible, it can also be installed in different memory slots, and then turned on after installation (before operation, you should also touch the wall with both hands to release your static electricity or wear anti-static gloves).

If you don't know how to operate, then it's simple: slap or kick the chassis once or twice (pay attention to the location: the front of the shell on the left and right sides of the chassis that has no interface at the back; Attention Tract:

Don't push too hard, and certainly don't be weak). The above may need to be repeated, and if it doesn't work, you need to replace the memory module. If you have more than two memory modules, you need to test them one by one.

2.If the above operations do not work, turn off the power and turn on the chassis, reinsert the graphics card, and plug in the data cable between the monitor and the graphics card. If it still doesn't work, consider that the cable or graphics card is damaged, then replace it with a new one.

3.If the monitor is not powered on (the indicator light is not on), check whether the power switch is turned on, then check the back of the monitor, plug the power cord connected to the monitor upwards (the power cord can be replaced if possible), and check whether the other end of the power cord is powered on to the outlet.

4.If the display can be displayed when connected to another monitor or the display of this machine is connected to another normal host and still cannot be displayed, it means that the monitor is damaged and needs professional repair.