power cycling(1) In the case of a frozen or hung device, power cycling refers to turning the device's power off and then on in order to get the device to function again. For example, if a desktop computer freezes, the user is unable to perform a routine shutdown by utilizing the shut down window. In order to get the device working again, the user must power cycle the device by manually by pressing the power key or disengaging the power source.
(2) With cable modems, power cycling is the process of unplugging the AC power adapter from the power source and plugging it back in.
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