Urgent: My computer suddenly won t turn on today

One is the problem of memory modules

Then there's the issue of the graphics card.

You press the power off, can't you turn it off?

1. Maintenance ideas that cannot be turned on and have no alarm:

The biggest possibility, that is, the most doubtful of the failure to turn on and no alarm failure, is: 1Power supply;; 3.

Mainboard. Because as long as one of these three pieces of hardware is faulty, the motherboard will not start, and the motherboard will not alarm if it does not start. Faulty is not necessarily a faulty accessory, but a poor contact is also a fault.

So follow the steps below to check:

1.Measure whether the power supply can output each voltage normally, and use the power supply to replace it directly when there is no measurement tool.

Whether the connection between the power supply and the motherboard is reliable, 20 plugs can be plugged and unplugged.

Whether the power switch on the panel is damaged. If necessary, you can directly short the PWR SW header on the motherboard to see if the motherboard can be started.

Perform the following checks after you are confident that the power supply is working.

2.Plug and unplug the CPU, if it doesn't work, change the CPU.

If the CPU can be started after unplugging and unplugging, it means that the CPU is in poor contact. The CPU cannot be started after unplugging and unplugging, and the CPU may be damaged, so change it.

CPU, changing CPU still doesn't work, all that's left is the motherboard.

3.The first choice for motherboard inspection should be whether the power supply of the CPU socket is normal, followed by the south bridge and the north bridge, each crystal oscillator, clock generator, etc. Can.

with the help of a motherboard diagnostic card. Of course, this is not something that the average DIYER can do. Only sent for repair.

ryw5 summary).

The battery on the motherboard is dead! Let's change it! Then please empty the motherboard's BIOS settings!

The power supply of the monitor is loose

If you have a power supply problem, try it with another one.

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 lamp and display are on, and replace the power line if it is not high.

3. If there is no problem with the power cord and the display is also on normally, then there may be a problem with the power supply, and then continue to inspect the hard car parts on the host to see if the hardware is in poor contact or the components are broken, you can also try to clean up 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.

Troubleshooting method for no display failure when the computer is turned on:

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, and smell whether there is a burning paste in the chassis, whether there are burned chips on the motherboard, and whether the capacitors around the CPU are damaged.

Step 3: If not, then clean the dust off the motherboard and check if the computer is in good condition.

Step 4: If the fault persists, unplug the reset cable on the motherboard and connect it with other switches and indicator lights, and then use the change cone short-circuit switch to see if it can turn 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 without display but there is an alarm sound, when the computer is booted up, the system BIOS starts to POST (power-on self-test), when it detects a fatal error 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.

What should I do if my desktop suddenly won't turn on?

Be nice to the computer, 13 hours, the cost of the computer is very much. Generally, it should not exceed 6 hours in a row!

It is estimated that there is a problem with the power supply of the host, so find a local maintenance personnel to take a look.

You can also try to change the power strip. Because you've tripped at some point.

Just reload the memory (just take off the memory module and put it back on with your finger).

In fact, there are many reasons why it can't be turned on, such as no power and memory sticks, which need to be checked one by one, if there are no problems, you need to take it to the repair shop to check.

Faults such as computer failure to turn on, freeze, black screen, blue screen, restart, and stuck operation can be checked according to the following items:

1. First of all. Check the power supply; 220V AC power supply (plug and socket are usually called); Then check the output voltage of the computer power supply (desktop check the fan of the power supply, notebook can listen carefully to see if the CPU and graphics card fans in the machine are rotating);

2. See if the computer can "self-test"; If you can self-test, you can generally reinstall the operating system;

3. If it is a black screen, focus on the inspection part (this is all and all the reasons for the black screen of the computer):

cpu；Mainboard. Memory; Graphics; display (desktop display); power supply (there is an output but the supply voltage is incomplete); and the plug-in parts and connecting wires of the above-mentioned parts;

4. Check and remove viruses, reset the BIOS, and reinstall the operating system. Reminder, if the fault persists after reinstalling the operating system and it is confirmed that there is no virus, you should consider replacing the operating system disk and trying again. In addition, after the system is installed, it is best to complete the patch before using it; to reduce the threat of viruses.

1.Boot press F8 to immobilize to the advanced option appears in the let go, select "the most recent correct configuration" Enter to repair.

2. Press F8 to enter the safe mode after booting up, and then exit, select Restart or Shut Down to boot on, and you can enter the normal mode (repair the registry).

3. If the fault persists, please use the system restore that comes with the system to restore it to the time when you did not have this failure (or use the restoration software to restore the system).

4. If the fault persists, use the system disk to repair it, open the command prompt and enter sfc scannow Enter (there is a space between sfc and ), insert the original system disk to repair the system, and the system will automatically compare and repair.

5. If the fault persists, set the optical drive in the BIOS as the first boot device, insert the original system installation disk, press the R button, and select "Repair Installation".

6. If the fault persists, it is recommended to reinstall the operating system. You can try the U Guard (uweishicom) U disk installation system, which is easy to use, free and clean.