Manually shutting down the computer (as in holding the power button until it shuts off, pulling the plug, or your PC has a toggle power switch) is an improper way of shutting down your PC.
It can cause corruption in your operating system, and possibly a non-working computer upon restart. Many save manually turning a system off for when it is an emergency such as your computer froze and you can not repair it via input devices.
General computer practice says generally not to perform a shut down manually. Most new computers come with reset switches in case of emergency, also the buttons are not toggle, and most operating systems allow you to begin the proper shut down procedure simply by pressing the power button once.
It allows the computer to reboot.
turning the computer off
I guess it really just depends whether it is on or not and what kind of computer it is. If it is on I recommend turning it off do to radiation. Which is believed to cause cancer. But if your computer is off then I just suggest to be careful where you put because you can cause damage to it.
e monitor
Only if you're very unlucky and the switch bounces; turning on the power is more likely to cause damage as components are cold and suddenly receive power, heating them up.
Basically turns off or hibernates your computer.
Reset
It is always best to use the proper shut down sequence when turning off your computer, because there are many programs which are constantly being used in memory, however in the case of an emergency (lightning storm) or a system freeze, it is better to manually turn it off.
A computer can not turn off by itself. The monitor just turns blank it you leave it. To turn off the computer you have to prees the on button on your computer. If you press the botton on the monitor it is not turning the computer off... just the screen.
No, use the power button to turn off your computer. USB is best because You can unplug and plug the keyboard back in without your computer turning off.
Be sure the dome light switch is not turned on manually.
A power cycle is turning off and turning back on any electronic device.