Fake boot (also known as a Double boot) is a feature of the BIOS and may occur after changes to the BIOS. Changing some parameters in the BIOS will cause this issue, even for just setting a system as stock speeds, such as initializing the current CPU and memory clocks. When certain parameters, such as the ones before, from the BIOS are set, it will require a reboot.
So if the computer didn't have any power and had just been plugged in these parameters will need to get implemented again, and since these parameters require a reboot, the computer will do a quick reset (Fake Boot) to implement these parameters that are set in the BIOS. Even after the computer is turned off, these parameters won't need to be re-implemented as long as the power supply is still receiving power.
A fake boot proceeds as such, the PC will power on for about 2 seconds, then off for about a second, then it will turn back on and display the POST screen and continue to boot up normally.
Famous quotes containing the words fake and/or boot:
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Or deal in fake jewelry or ruin a fine tenor voice
For effects that bring down the house could happen to all
But the best and the worst of us . . .”
—W.H. (Wystan Hugh)
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—Lu Yu (d. 804)