Computer interface, signals:
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Turn on, turn off the old monitor
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The USB flash drive is inserted, removed
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Insert the disk into the drive, read the
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Signal, interference, Modem connection
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Turn on, turn off the hard drive
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Turning on the computer, fan noise, shutting
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Turn off the old computer, Turn on
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Repeatedly pressing a computer mouse
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Turning on the laptop, fan noise, shutting
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Closes the CD / DVD tray, disc read, Opens
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Manual copy machine
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Computer keyboard
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