Why does the Lenovo computer turn on and the screen goes black?

Sometimes our Lenovo computer has a black screen when it starts up. What is going on? Then let me tell you the reasons and solutions for the black screen when Lenovo computers start up! I hope it can help. You guys!

Causes and solutions to black screen on Lenovo computer startup:

First try the following operations: Remove the battery and power interface card, press and hold the switch button for 30 seconds to discharge the static electricity light, wait for about 15 minutes, and then connect the power interface card separately to power on the computer; if it still cannot be turned on, it is due to the following reasons.

1 The first reason: The startup circuit of the notebook motherboard is faulty, such as clock, reset, power supply, MOS tube, etc., which may cause the inability to boot, black screen, and I/O problems. Can't start the computer, black screen, wait, solution: send to after-sales service or repair shop to repair the motherboard.

2 The second reason is that the screen cable of the notebook is broken or has poor contact, resulting in no image. The signal is transmitted to the screen for display, which is a black screen. The solution is to ask the laptop repairman to reconnect the screen cable or replace the screen cable.

3 The third reason is that the notebook's power interface card is damaged and cannot be powered on, or the notebook's battery is out of power, causing the computer to fail to boot and display a black screen. Solution: Replace the power interface card, or fully charge the battery.

4 The fourth reason: The notebook’s memory and graphics card are oxidized, resulting in poor contact with the memory slot or graphics card slot, resulting in an inability to boot and a black screen. Solution:

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The solution is to unplug the power, open the back cover of the notebook, take out the card slot of the memory, if it is not an independent graphics card welded to the motherboard, also take out the card slot, and align the golden fingers of the memory and graphics card Use an eraser to rub the area with the copper piece back and forth a few times to blow away the dust, then plug it back in, close the back cover, and it will generally be OK to turn on the phone.

5 The fifth reason: The video memory of the notebook display card has a weak solder, the performance of the main chip is reduced, the display card BIOS is messed up, and there is a problem with the control power IC, which will cause the display card to not work properly. That is to say, the display card is broken. Because the display card is broken, it will naturally not be able to boot and the screen will be black. The solution: Jianyi repairs the display card or replaces the display card.