if you disconnect your xbox will xboxlive work wen u plug it bac in

If you disconnect your xbox from what? The internet? Power?
You shouldn't be able to access XBL if either one of those are unplugged, and to my knowledge, you should be able to able to connect to xbox live once you reconnect it.

Just out of curiosity, why are you asking this question?

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Every time you shut of your XBOX you are disconnecting from Live.

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yea it should lol this question is pointless

If you unplug it from anything, except the TV or controller, it will be disconnected, if you turn it back on, it will be reconnected.

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