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1 Laptop won't shut down completely Forum. 2  SolvedPC Completely shuts down, wont turn back on, very random. 3  Forum. 4  SolvedComputer shut down after turning on from sleep, now won't stay on for more than ten minutes.
And it certainly only applies while the computer is running. If the computer's powered down, it has no way to tell the external drives it's time to shut down now. Even with the power on, the drives themselves automatically turn off after some period of inactivity.. That's why I say it kind of depends on what your external drives do when they get bored, as I call it.