Why is it that after my computer is installed with the system, the power on and off is normal, and i

The power supply is broken, and the initial start-up charging is insufficient, resulting in insufficient power supply and inability to turn on.

1. Open the chassis to remove the power supply and check the power rating of the power supply.

2. According to the rated power of this power supply, you can buy a new power supply and replace it.

It is estimated that it is still not reinstalled, and the virus inside is more serious, and the drive disk is broken.

It may be that the motherboard button battery is exhausted and needs to be replaced, so remove it and test it with a multimeter. A new one should be fine.

If the normal hard disk starts, repartition it with DM, or set the boot partition, if it is not to replace the COMS battery, or replace the crystal shock.

Looking for the relevant information about the motherboard settings, you should be fine when you boot up and adjust the first adjustment to the hard disk.

The desktop can't turn on after a sudden power failureSolution 1:

The reasons and solutions for the computer not turning on after a sudden power failure are as follows:1Don't be in a hurry just yet, check the power supply first:

Unplug the power plug of the motherboard, ignore other power supplies (such as hard disks), short the green wire and the black wire, the power supply fan should be rotated, and there is a voltage output at this time. If it does not rotate, it is a power failure.

2. If the power supply is normal, you should suspect that there is something wrong with the motherboard, and you can take the minimum system method to see if the motherboard is started? Then connect the parts one by one, and when the faulty parts are connected, there is a crash, that is, there is a problem with the parts.

The desktop can't be turned on after a sudden power failureSolution 2:

1. There are many cases that cannot be turned on, and generally speaking, there are probably several hardware reasons that cause the system to fail to turn on 1. The computer power supply fails, resulting in the inability to supply power to the host normally. This is usually manifested by the main engine power supply not lighting up.

2. This kind of failure is generally caused by poor contact between the memory module and the motherboard memory slot, and the memory damage or the motherboard memory slot problem will also cause this kind of failure. There will usually be a continuous long tone alarm.

Recently, some friends reported that their computers were turned on every day, and the power was immediately cut off after pressing the power button for less than 2 seconds, and then they turned it on again and immediately lost the power. Keep circulating. Although this situation is a bit troublesome, it can still be solved, so let me share the solution with you, I hope it will help you

Software issues

First of all, if the computer presses the boot button, the signal lights will still light up, and the screen will also light up, we can be a little glad that the computer is only a problem with the software, and there is no problem with the hardware;

The software problem that can make the computer keep restarting may be infected with a virus, or the system file is corrupted, and there are two direct solutions to the software problem;

The first solution, press the F8 key when the computer is turned on, and enter the safe mode of the computer.

Select "Last correct configuration", and that's it;

If you are not sure when to press F8, you can press the power button and keep pressing F8 until the interface shown in the figure appears).

If the first method doesn't work, or if you can't get to the interface shown above after pressing F8, then the simplest and crudest solution is to reinstall the system.

If you don't have a system CD, the most thorough way is to factory reset your computer.

Different laptops and computers have different ways to restore factory mode, so I won't go into more detail here.

Hardware issues

There are many kinds of hardware problems that cause your computer to keep restarting, including the power output of the power supply.

Lack, CPU temperature.

Problems such as too high, corrupted cache, loose graphics card, etc.;

For hardware experts, you can disassemble the computer by yourself to find out the problem;

The computer can't turn on after a sudden power failure, what should I do?

The computer can't turn on after a sudden power failure, what should I do? Step 1: First of all, check whether the external wiring of the computer is connected, and plug in each cable again to see if the fault is eliminated.

Step 2: If the fault persists, then open the main chassis to check whether there is any excess metal in the chassis, or a short circuit caused by the deformation of the motherboard, smell whether there is a burning paste smell in the chassis, whether there are burned chips on the motherboard, whether the capacitors around the CPU are damaged, etc. Step 3:

If not, clean the motherboard from dust and check if the computer is OK. Step 4: If the fault persists, unplug the reset cable and other switches and indicator lights on the motherboard, and then use the cone short-circuit switch to see if it can be turned on.

Step 5: If you can't turn on the computer, then use the minimum system method, unplug the data cable of the hard disk, floppy drive, and optical drive, and then check whether the computer can be turned on. Then connect the above devices to the computer one by one, when connecting a certain device, the fault will recur, indicating that the fault is caused by this device, and finally focus on checking this device.

Step 6: If the fault persists, the fault may be caused by devices such as memory, graphics card, CPU, motherboard, etc. Then, use the plug-in method, swap method and other methods to check whether the memory, graphics card, CPU and other devices are normal, and replace the damaged devices if there are damaged devices.

Step 7: If the memory, graphics card, CPU and other devices are normal, then discharge the BIOS, use the isolation method, place the motherboard outside the chassis, connect the memory, graphics card, CPU, etc. for testing, if the computer can be displayed, then install the motherboard into the chassis for testing until the cause of the fault is found. If the fault persists, you need to return the motherboard to the manufacturer for repair.

Step 8: When the computer is turned on and started, the system BIOS will start to post, and when a fatal error is detected in a device in the computer, it will control the speaker to send out a sound to report the error. Therefore, there may be a fault that the power is turned on without displaying an alarm sound.

If the computer is turned on and there is no alarm sound, the fault can be checked according to the meaning of the BIOS alarm sound to check the faulty device to eliminate the fault.

Many users have encountered the situation of computer crash caused by sudden power failure, but how can we solve this problem? Maybe many users who are not familiar with the computer are not very clear, so what we have sorted out for you today is the solution to the problem that the computer can't turn on after the sudden power failure, let's look down together.

Here's how to fix it:

First of all, if the computer cannot be turned on normally due to a sudden power failure, it is not necessarily a system failure, and it can be eliminated according to the following methods.

1. On the premise of disconnecting the power supply, open the side cover of the main chassis to remove the memory module and replace the position of the memory installation slot.

2. Find the motherboard battery, and remove the motherboard battery, discharge for 15 seconds to 20 seconds, you can also use the motherboard, the jumper cap next to the battery shorts the motherboard to restore the default settings of the motherboard, basically suddenly power off, resulting in a normal boot, you can use this method to eliminate hardware errors first.

3. With the help of the U disk PE system, restart the computer and use the shortcuts ECS, F10, F11 or F12, etc., to select the U disk to start, and eliminate the reason that the main hard disk of the computer cannot be recognized due to sudden power failure, or the system error causes the system interface to not be able to enter the system interface normally.

4. Many computers have system backups, and you can choose to restore the factory system by yourself. Fourth, it is to connect with another computer and reinstall the system.