The computer is turned off and then turned on again, why does the computer turn on and start itself

Generally, the graphics card will burn out, and the motherboard will have problems, so you'd better take the whole machine back to the computer store to see.

If you can see the motherboard screen of booting, you just reinstall the system.

I think it would be good to try redoing the system.

Why does the computer turn on and start itself and then turn it off and then turn it on again, and the repeated switching on and off proves that there is a problem with the hardware, and you need to check the computer motherboard.

Generally, the restart is caused by your own incorrect operation, remember not to do the operation that is easy to cause the restart. The computer should not operate at full capacity, that is, when playing games, watching **, **, and watching web pages at the same time, it is easiest to restart, freeze, and blue screen, so don't operate other things when playing games, watching**, **, and watching web pages. No matter what you're doing, as soon as there is a sign of a card, stop what you're doing and quit the trial, so you don't restart, and if you still do, don't play or don't look at it.

In terms of hardware, the temperature of CPU and other hardware is too high, the memory is less than the card, the hard disk is bad, the voltage is unstable, and the hardware is not suitable.

There are two power-off problems:

A: After 20-30 seconds, the power is off, and the fan on the CPU is loose.

Second: the motherboard and chassis may be short-circuited.

The current chassis is a piece of iron, so if you don't get it right, the chassis frame is not good, and it's easy to short circuit.

You put the green and black short wiring of the power supply and see if it can work all the time, if you can, then the motherboard is the problem, clear the motherboard battery and try.

Depending on the specific state of power on/off, there are hardware and software problems that cause this phenomenon.

Hardware, if the display has no signal display, but the light of the host will be on and off for a while, and then on and on, and the internal fan will stop after a while, and then turn again. This is a memory issue, to unplug the memory for cleaning.

Software,That is, the system,The display has a signal,There are some English boot interfaces when you boot up,But soon it will automatically restart,This is going to reinstall the system。

It means that there is a problem with the startup of the computer, and the startup failure is encountered during the startup process, so it is restarted.

1. It is the system reason to reinstall the system.

2. Set the update time by yourself, and the system will be turned on and off repeatedly for updates.

This should be a fault of the power supply hardware, the output voltage of the power supply is unstable, such a fault will occur, and the computer will be automatically restarted.

Either there is a problem with the system or hardware motherboard, let's see which step to reboot first.