What should I do if the computer boot screen does not light up occasionally it will turn on normall

Wipe the graphics card and the data cable to see if the graphics card or the data cable connected to the graphics card is not in good contact. If it's okay, it's a problem with the motherboard, and it's OK to change the motherboard. In short, 1. The memory module interface and the memory interface on the motherboard; 2. Graphics card interface and graphics card interface on the motherboard.

I also have this problem after using my computer for a year or two (because the computer is in the store and there is more dust), so I just change to the old motherboard.

1. Laptop.

After booting on, the screen does not light up normally, and the problem is as follows. First make sure that the laptop is a true black screen.

Or a pseudo-black screen; The screen is pseudo-black without a backlight, but if you look closely, you can still see the words on the screen; The pseudo-black screen is generally due to the damage of the lamp tube and the need to replace the lamp, which can be repaired by a professional repair shop;

2. If the screen is really black, then the graphics card or Nanqiao is broken; If an external monitor is connected to the VGA port of the notebook, if the external monitor is also not lit, it can be determined that it is a problem with the graphics card; If the graphics card is broken, you can replace it with a new one; If the external monitor is normal, then it is the problem of the screen itself or the screen cable.

First, make sure that the external and internal connections are connected smoothly. The external connection has a monitor, a host power supply, etc. There is a cable between the host power supply and the host power connector inside (sometimes the contact here is not good).

The more common reasons are: graphics card, memory due to long use, long-term contact with dust in the air, resulting in the oxide layer on the gold finger, resulting in poor contact. In this regard, rub the gold finger back and forth with a moderate amount of alcohol glued to cotton, and insert it back after drying.

In addition, observe whether the CPU is working normally, turn on for about half a minute, and touch the heat sink of the CPU fan with your hand to see if there is a temperature. If there is a temperature, the possibility of CPU failure can be basically ruled out. If there is no temperature, tidy up the socket of the CPU to make sure the contact is in place.

After that, before the temperature, your CPU can be upgraded: (In addition to the above method, there is also a nirvana: use the jumper method to clear the BIOS settings or replace the CMOS battery of the motherboard.)

When using a laptop, users sometimes encounter tricky glitches, such as when the laptop is running normally after booting up, but the screen does not light up. Because the screen does not light up, the user does not know how to solve this fault problem, in fact, this situation is generally the motherboard self-test does not pass or the problem of the screen lamp. Let's take you to learn how to solve the problem of the laptop boot screen not lighting up!

The method is as follows: 1. Determine whether the laptop has a true black screen or a pseudo black screen;

2. The screen is pseudo-black without a backlight, but if you look closely, you can still see the words on the screen;

3. The pseudo-black screen is generally due to the damage of the lamp and the need to replace the lamp, which can be repaired by a professional repair shop;

4. If the screen is really black, then the graphics card or South Bridge is broken;

5. If the graphics card is broken, you can replace it with a new graphics card;

6. Connect an external monitor to the VGA port of the notebook, if the external monitor is not lit, it can be determined that it is a problem with the graphics card;

7. If the external monitor is normal, then it is the problem of the screen itself or the screen line;

8. It may also be a memory module problem, such as the memory module is loose, Neichangxun has no memory stick, open the back cover of the notebook, reinsert the memory module or replace the memory module: how to install the memory module on the notebook;

The above is the solution to the normal operation of the laptop after the laptop is turned on, the screen does not light up, generally in this case, first determine whether it is a pseudo-black screen or a real black screen, and then judge whether it is a problem with the graphics card or the screen itself or the screen line, I hope the above analysis can be helpful to everyone!

1. After the laptop is turned on, the screen does not light up during normal operation, and the solution is as follows. First, determine whether the laptop has a true black screen or a false black screen; The screen has no backlight, and it is a pure pseudo black screen, but if you look closely, you can still see the words on the screen; The pseudo-black screen is generally due to the damage of the lamp, and the lamp needs to be replaced by hand, so you can go to a professional repair shop for repair;

2. If the screen is really black, then the graphics card or Nanqiao is broken; If an external monitor is connected to the VGA port of the notebook, if the external monitor is also not lit, it can be determined that it is a problem with the graphics card; If the graphics card is broken, you can replace it with a new one; If the external monitor is missing a lot, then it is a problem with the screen itself or the screen cable.

1. There is a problem with the graphics card of the host.

Check to see if the graphics card is broken, and see if the host has an alarm sound. If you're using a discrete graphics card, unplug it and plug it into the integrated graphics card to see if the integrated graphics card has a signal.

Solution: Memory problem: First check whether the memory is plugged in tightly, generally after the chassis is moved, the memory may become loose and cause a boot failure.

In addition, it may be that the host has accumulated too much dust and caused a short circuit in the memory, you can blow the dust near the memory slot first, and then use an eraser to wipe the gold finger of the memory module after cleaning it up.

2. There is a problem with the cable of the monitor.

In many cases, the data cable of the display is not plugged in, resulting in the signal not passing, the display is not bright, or the data cable is faulty, which can lead to the signal cannot be transmitted.

Solution: Change to a new display cable.

3. The monitor is broken.

Find a different monitor, switch to this console, and see if there is a display. If you don't have many monitors, you can take a laptop, connect this monitor to the laptop, and then check if it can be displayed.

Workaround: Repair the monitor or replace it with a new one.

4. Power failure.

If the screen is not lit and the computer indicator is responsive, and you can see a faint image with a flashlight, just change the backlight.

If the keyboard light is on, press the numlock or caps toggle key at the top left of the keypad to see if the keyboard indicator responds. If so, pay attention to the sound of the system starting. If the keyboard light is responsive, it means that the system boots up normally, but it just doesn't show up.

Solution: Power on the monitor or the host.

5. Lamp failure.

Replace the lamp with reference to the LCD instruction manual, and it is best to take the LCD to a professional repair shop for maintenance, which is more safe and reliable.

If you replace the LCD backlight by yourself, you should be careful to avoid unnecessary losses.