What s going on when the laptop doesn t turn on with a black screen?

Lenovo laptop G480 has a black screen, and there are six reasons why it can't be turned on: (the following includes the processing scheme).

The first reason: the adaptation power supply of the notebook is one of the main reasons for the black screen of the computer, because there is no power input, the host and the LCD screen can not work, so the black screen, the solution: replace the adapter of the notebook, it is OK

The second reason: the memory and graphics card are oxidized, resulting in poor contact with the memory slot or graphics card slot, resulting in a black screen, it has a black screen probability of 80%, the treatment method: is to turn off the power, open the compartment, dial out the memory, and the graphics card, align the memory and the graphics card gold finger (that is, where there is a copper sheet) with an eraser back and forth at least 6 times, blow the ash, and then plug it back, boot is generally OK.

The third reason: that is, the graphics card's video memory is soldered, the performance of the main chip is reduced, the graphics card BIOS is confused, and the control power supply IC is problematic, which will cause the graphics card to fail to work normally, that is, the graphics card is broken, and the graphics card is broken, and the screen will naturally be black.

The fourth reason: there is a problem with the boot circuit of the motherboard, resulting in a failure to turn on, a black screen, a problem with the main power supply of the CPU, and a problem with the CPU, and a problem with the computer, a black screen, etc., In short, the components on the motherboard are faulty, many will not be able to turn on, black screen, many notebooks encounter this situation, the solution, the fifth reason is that the screen line of the notebook is broken or the contact is poor, resulting in no image signal transmitted to the screen display, That is, the black screen, the solution: ask the person in the Weili notebook to plug in the screen cable again, or replace the screen cable.

The sixth reason: If you can see the black screen of the English letters after booting, it has little to do with the hardware, this is the relationship between the software, generally the system is broken, the main boot record is damaged, the partition table is damaged, the startup items are not set, and the boot screen is black. In this way, it can be repaired by reinstalling the system, rebuilding the master boot record, rebuilding the partition table, and resetting the first boot item.

Your focus is on whether it is suitable for the power supply and screen cable problems, and the reasons for the motherboard cannot be ignored.

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。

Common solutions to the black screen of the laptop won't turn on:1It may be that it is now in a state of hibernation, notebook hibernation is a state in which the notebook is at rest, and then the notebook is in a state of suspended animation and black screen, which will be mistaken for a black screen, as long as you press any key of the notebook, you can restart, the notebook has not been used for a period of time or has entered a state that shows that the battery is insufficient, the system may start sleep state and hibernation mode, if you use the computer for a long time, forget to shut down the computer after the computer has a black screen, try to connect it to the power supply, charge it for a while and then use the laptop.

3Step 3: Listen to the voice 2After booting up, the screen is black but you can make sure that you can enter the system normally when you hear a sound, try to connect an external monitor to see if the graphics card output is normal, if you connect an external monitor to turn on and display normally, it means that it is a problem with the LCD screen or cable arrangement of the notebook, 4 step 4 listen to the voice 3It may be a bad contact, it is recommended to restart the notebook again, if it still can't solve the problem, it is that the display is broken, it is recommended to go to the repair shop for repair, 5 step 5 listen to the voice 4

If you have the ability, you can try to 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. 6 Step 6 Listen to the voice 5If it still can't be solved, restart the computer, keep pressing F8, enter the safe mode, enter the antivirus, repair the missing system files, and then reboot the computer, maybe it will be solved.

I hope the above is helpful to you.

1. If it is invalid, it may be caused by system or driver software problems, try to restore or reinstall the system after backing up the data. As drafted.

2. Solution 1 for the black screen of the laptop and the machine cannot be turned on: caused by static electricity in the battery. Check if the laptop's battery can be removed.

Remove the battery and connect it with a separate power interface card. Try to boot it again. Because the battery static electricity will cause problems with the motherboard, it will not be able to turn on.

3. Please try to press the combination function key to increase the brightness of the virtual scrolling screen of the screen, turn on and off the switch display, and avoid the screen brightness being too low or the black screen of the computer will not be displayed due to the closed screen and the rubber curtain.

4. Please try to increase the brightness of the screen, and turn on and off the toggle display to avoid the screen brightness being too low or the black screen of the computer will not be displayed because the screen has been turned off. Boot the computer and enter the BIOS interface to check whether it is displayed normally? (1) If the BIOS interface is not displayed on a black screen, it may be a problem with the computer hardware, please bring the machine to the service center for testing.

5. The user can first check the memory module, re-insert the memory module, and clean the gold finger of the memory module; Secondly, you can check whether the graphics card is loose, also pull out and clean the gold finger of the graphics card, then plug it back in, and re-check whether the computer boots up with a black screen.

6. If we can enter the safe mode normally, we can delete the software or driver installed before the black screen in the safe mode. Then restart the machine and see if the laptop can fix the black screen issue.

Applicable environment: Product model: Lenovo Rescuer did not quarrel Y7000P

System version: Windows 10 Professional.

Procedure Method.

Method 1Step 1.

1. Try to press the combination function key to increase the brightness of the screen, turn on and off the toggle display, and avoid the screen brightness being too low or the black screen of the computer will not be displayed because the screen has been turned off.

Step 2. 2. Press the F2 button when you boot up, enter the BIOS interface and check whether the blocking is displayed normally.

Step 3. 1) If the BIOS screen is black, it may be a hardware problem, please bring the machine to the ASUS service center for testing.

Step 4. 2) If the BIOS interface is displayed normally, please try to press the F9 button on the BIOS interface to restore the default value, then press F10 to save and exit, and restart the computer.

Step 5. 3. Please confirm whether you have installed memory or other hardware. If so, please remove the additional memory and other hardware before turning on the computer to confirm.

The first 6 steps.

4. Remove the transformer and press the power button for 40 seconds (press and hold without letting go).