If the computer cannot be turned on, you can check the following steps: 1. Check whether the power supply is normal, including plugs, sockets, power cords and battery power; 2. Confirm whether the screen is completely undisplayed and not the computer is not started, and you can judge the sound of the fan or hard disk; 3. Troubleshoot the monitor connection problem and try to connect to the external monitor; 4. Troubleshoot hardware failures, such as loose memory stick, abnormal motherboard power supply or power module problems, and seek professional help if necessary. Most cases can be solved through basic investigation without the need to replace the equipment immediately.

It is really a headache to not turn on the computer, especially when you are in a hurry. This situation may be caused by a variety of reasons, some are small problems that can be solved by doing it yourself, but some require professional intervention.

Check if the power supply is normal

First, confirm whether it is a power supply problem. Many people's first reaction will be to press the boot button, but in fact, you should first check whether there are any abnormalities in the most basic areas.

• Is the plug plugged in properly? Is the socket electric? You can change the device and try to see if the socket is normal.
• If it is a desktop computer, check if the power cord is loose or damaged.
• For laptops, is there any battery power? Try plugging in the power adapter and turning it on.

Sometimes it’s just a poor power contact, and it’s solved by re-plugging and unplugging. If all these are OK, then we need to consider the deeper reasons.

The screen does not respond ≠ The computer does not start

Some people think that the computer is not turned on at all when they see the screen black, which may be a problem with the monitor.

• Listen to whether the fan is rotating and whether the hard drive is ringing. If so, it means that the computer may have started, but the screen does not display.
• Check whether the monitor cable (such as HDMI, VGA) is inserted.
• If it is a laptop, try pressing the "Power Key" for a few seconds to force shut down, and then try to turn on the power normally again.

Sometimes the motherboard can boot, but the screen cannot be output due to some hardware failures. At this time, you can try to connect an external monitor to determine what the problem is.

Hardware or motherboard problems cannot be ignored

If you have ruled out the power and monitor problems and still can't turn on the machine, it may be that there is something wrong with the internal hardware.

• The memory stick is loose: open the host box, unplug the memory stick and plug it again to ensure good contact.
• The motherboard power supply is abnormal: Some motherboards will have an indicator light when power is on. If not, the motherboard may be broken.
• Power module failure: The desktop computer can use the replacement method to test whether the power supply is normal.

This type of problem is difficult for ordinary users to judge by themselves. It is recommended to find friends who know how to help or send it to the repair site for inspection.

Basically these common possibilities. Don’t think about changing the computer as soon as you come up. Many situations are actually just minor problems. The investigation sequence is from simple to complex, and you may be able to do it yourself.

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