The screen lights up after the Dell laptop is turned on, and the system can t get in for some reason

One of the most common faults in the system.

The Dell laptop does not respond when it is turned on, and the yellow and white indicators keep flashing alarms, which is a common fault of Dell laptops. When encountering this kind of failure, we should analyze the problem from the following aspects:

1. The power supply circuit of the motherboard is faulty.

Failure of the boot circuit of the notebook motherboard, such as clock, reset, power supply, MOS tube, etc., may cause boot failure. There is a problem with the io chip, it does not boot the computer. This kind of hardware failure cannot be repaired by a professional unless it is a professional.

Solution: Send the motherboard or repair shop for repair after sale.

2. Hardware problems outside the motherboard.

First of all, please try the following: unplug all batteries and power adapters, press and hold the switch button for 30 seconds, release the static electricity, wait for about 15 minutes, and then connect the power adapters separately to power on; If it doesn't work, here's why.

1. The laptop memory is oxidized with the graphics card, and the memory slot or graphics card slot is in poor contact, resulting in a black screen on the machine, and the possibility of a black screen accounts for 60.

Solution: Turn off the power, open the back of the laptop, and remove the memory card slot. If the individual graphics card is not soldered to the motherboard, the card slot is removed and the eraser is rubbed back and forth several times on the memory and graphics card gold finger.

Then put the memory card and graphics card back in the card slot, close the back cover, and maybe the computer will boot up normally.

2. It is the main chip of virtual soldering and performance degradation of notebook graphics cards. If the graphics card BIOS is faulty and there is a problem with the control power IC, the graphics card will not work properly and the screen will naturally go black.

Solution: Simply repair the graphics card, or replace the graphics card.

3. The laptop screen cable is damaged or has poor contact, resulting in no image signal being transmitted to the screen for display, that is, the screen is black.

Solution: If it is still under warranty, it will be sent to the after-sales service, if the warranty period has been sent to a professional repair shop, let the professional repair.

3. System failure.

If the system boots normally after reinstalling, it is a system problem.

Fourth, the hard disk failure.

Replace it with a working hard drive and try to boot it. If the computer boots up properly and enters the system, it's a hard drive problem.

Hello dear, you want to solve according to the situation:1The boot display screen is black, the indicator light is on, and the host does not have any reaction.

I can't feel the fan spinning behind my hand behind the main unit. None of the voltages are measured. Remove it and find that the power adjustment tube is broken, and replace it with normal.

2.The long sound alarm at boot should be a memory failure. Unplug the memory, clear the gold finger, and insert it normally.

3.The power supply and CPU fan are normal, but the screen is unresponsive and there is no self-test sound. This machine adopts slot1 structure, the CPU contact is poor, and it can be reinstalled.

Summary. Hello dear, happy to answer for you. The power button of the Dell computer is still lit and the screen is black is caused by the fact that the computer may have been infected with a Trojan virus, here you can solve it by entering the safe mode of the computer and then checking the computer, the specific operation steps are as follows:

1. Here first try to turn on the computer again, press the windows+r key combination on the computer keyboard to bring up the computer system running box. 2. Enter msconfig into the run box, and then click OK3. After confirming, the system configuration box will pop up, and select Boot here. 4. After entering the boot interface, check the security boot, and then click OK.

5. After this is confirmed, you need to restart the computer to enter the safe mode. 6. After entering the safe mode of the computer, the operating system of the computer will no longer suddenly go black, and the computer can be comprehensively diagnosed.

Here's why.

Turn on the keyboard on the Dell computer, and the screen is not lit.

Hello dear, happy to answer for you. The power button of the Dell computer is still on the screen is a black screen is caused by the computer may have been hit by a Trojan virus, here you can enter the security mode of the computer and then check the computer to solve the problem, the specific operation steps are as follows: 1. Here first try to open the computer again, press the windows+r key combination on the computer keyboard to bring up the computer system operation box.

2. Enter msconfig into the run box, and then click OK3. After confirming, pop up the configuration box of the system and select the guide here. 4. After entering the boot interface, check the security boot, and then click OK. 5. After this is confirmed, you need to restart the computer to enter the safe mode.

6. After entering the safe mode of the computer, the operating system of the computer will no longer suddenly go black, and the computer can be comprehensively diagnosed.