Re: Why did this work?
Because often times devices that have a carrier signal will go into a "disabled" state when they disconnect from one another and when you reconnect, it goes back into an "enabled" state - its how the cable company even knows you are hooked up and why stealing cable eventually gets you caught - they know there is a carrier there that shouldn't be. This procedure essentially resets the carrier signal that might be haywire because the teleco equipment resets itself when the port goes disabled and then reenables.
Additionally, lots of devices, although "turned off" are still hooked up and actually drawing power, however residual and therefore there is the chance that a skewed memory bit (or whatever) remains and allowing the power to dissipate completely clears that memory.
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