Basic Causes of No Power

This video explains that when a computer has no power, it does not respond when the power button is pressed and there are no signs of activity such as lights, images, beeps, or fan operation. The causes for this issue could be a disconnected power cable for desktops, or a defective battery, AC adapter, or power supply unit for laptops. It could also be due to a defective system board or power outlet.

No Power means the computer doesn't respond when pressing the power button to first start it. There are no signs at all. No image on the screen, no lights illuminated, no beeps heard, and no fans operated.

Common causes include, for desktops, a disconnected power cable, and for laptops, possibly a defective battery, AC adapter, or power supply unit. It could also be that your system board is defective, or even the power outlet that you are plugged into is the problem.