Is it normal to plug in the power supply and turn it on?

This is a setting in the motherboard BIOS that has not been adjusted.

That's what it means, and that option is:

After powering on without normal shutdown: there are two more options: turn on the power directly, without any startup. Just turn this option off.

Or turn off the computer normally, and the above situation will not occur.

Abnormal It may be that there is a short circuit somewhere, and it is best to ask someone to check it to avoid problems.

If there is a problem with the motherboard, disconnect the power supply, put the motherboard down, and if it still doesn't work, just wait for it to break down and replace it with a new one.

It looks like you haven't turned off your computer, and half of your computer won't be plugged in. Just like you are now, when plugging and unplugging, if the current is too high, it may cause the computer to burn out.

It seems that it is a problem with the BIOS settings, or the motherboard battery is dead, and that's it.

As soon as the power is turned on, the computer will automatically turn on, and there are usually two possibilities:

1. Poor quality of the motherboard or power supply. If the power supply or motherboard is not of good quality, when the host is connected to the power supply, an instantaneous inrush current will be generated, which may make the power supply mistaken for a power signal, resulting in automatic power on as soon as the power is turned on.

2. The BIOS settings of the motherboard are incorrect. There is a "Power Management Setup" setting item in the motherboard BIOS, in which you can select the status of the computer when the power is re-powered after an unexpected power failure, which can be divided into auto-power-on, keep the shutdown state, maintain the state before the power off, and set the auto-boot to OFF.

1. Reason: If you plug in the power supply for a period of time to turn on, this is because there is a problem with one (or some) capacitors in the power supply part circuit, so it cannot respond immediately and the current cannot be output instantly.

2. Suggestion: go to the after-sales service for maintenance or replace a power supply.

Related principle: a. The mains power is 220V alternating current, and the computer needs direct current to work, and the role of the computer's power supply is to convert the alternating current into direct current for the computer. Capacitors play a central role in the smooth operation of the entire system in this process.

b. The capacitor itself has the function of charging and discharging, and the situation you mentioned is because of some reasons that cause the impedance of the capacitor to become larger, which makes the charging and discharging efficiency of the capacitor decrease and the charging and discharging time becomes longer, so it will be so slow to enter the normal working state.

When you turn it on, the clock is incorrect, the battery on the motherboard is dead, a total of 5 yuan to buy a replacement, and the clock is normal.

If it can be turned on after a period of time when it is plugged in, it is a capacitor in the power supply part of the circuit, so it cannot respond immediately and the current cannot be output immediately.

It may be that the power supply of the computer is malfunctioning, so the motherboard battery cannot be charged normally, resulting in a time error. A few years ago, the power supply of my desktop computer took a few minutes to turn on, that is, the power supply of the computer was broken.

In this case, the coin cell battery that stores the BIOS information on the motherboard is out of power, replace the battery, set the date and time, and save and restart.

It is recommended to replace the button battery of the motherboard, and repair or replace a computer power supply at the same time.