How do you solve the problem when the computer suddenly won t turn on?

Power off - CTRL+ALT+DELETE or press and hold the power button to turn off the power off or unplug all external interfaces of the main unit and this panel after power off, including the power cable, and then press the power button for about 15s to let go. ‍‍

The hard disk is hung up or the system is broken, and the system will be reinstalled, try to reinstall the system, and if it won't or can't be installed, it will find after-sales. ‍‍

Try to start it yourself, find the reason, if it doesn't work, find a friend who understands the computer, and if it doesn't work, find after-sales. ‍‍

Restore the system, there are multiple modes to choose from, shut down several times, there will be an option to start an advanced boot, try to recover it, but it may cause loss of files. ‍‍

You need to reinstall the system, or it's a hard disk problem, you can't read it, just do a PE repair and boot it, if you can't, go to the computer store to reinstall the system. ‍‍

Let's see why it can't be turned on, and if you don't know what the reason is, reinstall the system and solve the problem 100%. ‍‍

Send it to the after-sales service to check if it is dropped, if you will, enter the BIOS to see if the hard disk is recognized, and the system can be reinstalled if it is recognized. ‍‍

Press F12 continuously to enter the BIOS interface, press F9 or find the Reset BIOS button, and then press F10 to save the configuration. ‍‍

Send it to the after-sales service and let the maintenance master test it because it can't be turned on, if you can solve it yourself, you can get it yourself, and if you can't get it, let the after-sales service get it. ‍‍

The computer can't turn on, there are several possible problems, one is the system is damaged, the solution, you can press F8 to enter the boot menu when starting, and select the last correct configuration to boot. If that doesn't work, the only way to do this is to reinstall the system.

Problem 2, after booting, the power fan is working, there is wind, but the screen is black, not bright, solution: this is the oxidation of the memory module, you can open the chassis, take out the memory module, and wipe the contact metal piece on the memory module with a paper towel, this is called gold finger. After rubbing and reinserting the memory module, you can boot up smoothly.

Question three, if the above two problems have been eliminated, it still can't be started, and the boot screen is still black, then you have to consider whether the motherboard is damaged, or the CPU, hard disk and other problems, you can go to the computer store and try to replace them one by one.

1. The memory module is loose or damaged.

Solution: Use an eraser to wipe the gold finger of the memory module and reinsert the memory stick; Replace the memory module.

2. Poor contact of the graphics card.

Solution: Same as memory method.

3. The main engine is short-circuited.

Workaround: Clean up the host and replug the wiring.

4. Motherboard BIOS problems.

The motherboard BIOS stores important hardware data, and if it fails, it can cause the computer to not boot.

Solution: Go to the motherboard BIOS settings page and restore the BIOS to the default value.

Method Step 1:

Step 1: First of all, according to the specific situation analysis, if there is no power response directly, then check whether there is a power supply, poor contact, hardware and other problems, go to the second step, if it is not possible to enter the system may be operating system or software problems to go to the third step.

Method Step 2:

Step 2: Check whether there is a power supply problem, first see if the power supply is not plugged in well or there is a problem with the plug, if you are using a battery, then plug it in and try again. You can go to a friend or go to a computer repair shop or sales store to find the same model of power supply to try it.

After replugging the power supply, press the power button again, and if it still can't be turned on, then press it for a while. If you change someone else's power supply to turn on, it means that there is a problem with the power supply, if it proves that there is no problem with the power supply, it may be the hardware reason, go to the fifth step.

Method Step 3:

Step 3: Go to the last correct configuration to adjust, turn on and press and hold F8, enter the advanced options page, select "The most recent correct configuration", and press Enter. If it can enter the system, it may be caused by viruses, incompatible hardware drivers with the system, or operating systems.

After entering the system, run the anti-virus software, check and kill the virus, if there is a virus, restart the computer after the anti-virus, if it is not normal, it may be caused by the incompatibility of the device driver and the program, delete the graphics card, network card and other drivers, restart it after removing the driver, if there is still a problem, then go to the next step.

Method Step 4:

Step 4: Repair and install or reinstall the system, set "Optical Drive as the first boot device" in the BIOS, then insert the system disk, and press the R button to perform "Repair and Installation". If the fault persists, just at the beginning of the system, select "One-click GOST to restore the system" or use the system disk to reinstall the system.

There are many reasons why a computer won't turn on, including software failures and hardware failures. If the power is not turned on and it is not powered on, consider the power supply or motherboard problem; If the boot beeps or lasts for a long time and a short time, it is considered to be a graphics card or memory problem; If the boot host is powered on and the display does not light up, check the power supply and output signal line of the display; If the boot disk cannot be found at boot prompt, it may be that the hard disk is damaged; If the message says that there is no boot disk or boot record, you need to reinstall the system.

It could be a fan problem.

Generally not a big deal. It's OK to reinstall the system.

This may corrupt the system files, reinstall the system now.

1. There is no response after the computer is turned on.

2. In this case, first judge whether the computer line is energized, check whether the computer power light and display are on, and replace the power line if it is not on, try to eliminate the problem of the power cord.

3. If there is no problem with the power cord and the display is on normally, then there may be a problem with the power supply, and then continue to inspect the hardware on the host to see if the hardware is in poor contact or the components are broken, you can also try to clean the dust of each part of the host, and then rule out whether the hardware is loose.

4. In the end, it is found that there may be a hardware problem, it is recommended to send the computer to the computer store for maintenance, and do not cause damage to other hardware by yourself.

It is likely that the reason for not being able to turn on the machine appears in seven aspects:

The first reason is that there is a problem with the power supply of the computer, such as the switch transistor, fuse, rectifier diode, filter large capacitor, etc., there is a problem, the power supply can not be exported, and the voltage and current can not be output. Reconnect.

The third reason: that is, there is a problem with the boot circuit of the motherboard, generally the triode, capacitor, and resistance of the boot circuit, there is a problem with the IO, there is a problem with the CPU power supply circuit, etc., as long as these original components are replaced, it is OK

The fourth reason: the memory in the host and the gold finger of the graphics card are oxidized, resulting in poor contact between the memory and the memory slot, and the poor contact between the graphics card and the graphics card slot, resulting in hardware incompatibility, which leads to the failure to boot.

Solution: You can turn off the power first, open the compartment, dial out the memory, use the eraser against the part of the gold finger (that is, where there is a copper sheet,) and wipe it back and forth a few times, and then insert it back as it is (or insert it back with a memory slot), it's OK, if there is a separate graphics card, you can also use the same method to deal with the graphics card, insert it back as it is, it's OK, the fifth reason: it's a problem with the boot twist on the host panel (such as not bounce up, broken), it can't be turned on, The sixth reason is that you can't turn it on, replace the torsion or change the cable, the sixth reason::: There is a problem with your graphics card, such as the virtual soldering of the video memory of your graphics card, the connected transistor of the VGA, the chip resistor, and the capacitor The power supply of the control chip is insufficient, and there will be a crash, restart, abnormal display, and so on, so it is recommended that you repair the graphics card, that is, repair the memory of the graphics card, or replace the graphics card.

The seventh reason is: 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 well, 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.

Among them, you should pay special attention to the fourth situation, which is 80% of the cause of the host computer not being able to turn on.