Do you need to turn off the power when the computer shuts down?

Often see some friends after the use of the computer, for the figure of the system in the implementation of the shutdown instructions to walk away, there is no host power completely cut off (that is, unplug the power outlets, from the strip completely removed), and sometimes even monitors and speakers and other peripherals are still working state. This in fact to the hardware of the computer buried hidden trouble, because the system in the shutdown state did not completely cut off the power, the power supply in the chassis, the motherboard is still connected with the mains, once the voltage fluctuation or encounter lightning weather is very easy to cause the motherboard, power and a variety of peripherals completely damaged. Here to advise you, for the safety of the shutdown must be completely cut off the power. Here are the reasons for everyone:

1, personal safety, if the chassis in case of short circuit, not accident.

2, the brain damage, turn off the power supply can avoid the impact of the machine caused by the unstable electricity.

3, save electricity, after shutdown the computer international standard is the power is under 3 W, but the domestic manufacturers can not reach this standard, there will be 5--7w about power consumption.