Analysis of the reasons why the win7 Ultimate system computer does not power on the black screen

1. The power cord is not in good contact or is not powered.

The switch button on the card may not be turned on, or the power cable and the chassis power supply are not plugged in, which may cause the computer to not be connected. Power is on, the computer is not powered, so it will not turn on.

2, may be the cause of the power switch

Many compatible machines or brand machines, there will be problems with the power button damage and can not be used, this problem is more common on the desktop, if not If the power button itself is broken, the connecting wire or solder joint inside is broken.

3, the computer's own hardware problems

The biggest reason for the computer is not powered is the computer's own hardware problems caused by the lack of power, a high probability is the power supply, followed by the motherboard power supply as the easiest One of the most expensive parts of the lost host is the most likely to fail. In fact, if your machine is a DIY compatible machine, you should pay attention to the power supply problem at the place where it is installed. Only the power supply is stable or the quality is excellent. The normal operation of the computer.

It is also possible that the motherboard does not have power on the motherboard. Generally speaking, the motherboard is broken and not powered, so even if the power supply is good, the motherboard cannot form a normal closed circuit. Therefore, There will be no power on.

ps: If the notebook or ultrabook is not powered, after the basic power cord and other surface problems are removed, it should be repaired in time. It is not recommended that you disassemble yourself, and the diy compatible machine appears. If there is no power, it is recommended to open the case and see if the interface is loose. I believe that the problem can be quickly detected.