Turn on, turn off the old monitor:
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Signals, Computer interface
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Input error sound, Pressing a keypad
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Signal, Modem connection, interference
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Manual copy machine
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Laser printer
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Removed, The USB flash drive is inserted
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Computer interface, alarm
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Computer keyboard
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Read the, Insert the disk into the drive
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Office work, environmental sounds, typewriter
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Shutting, fan noise, Turning on the computer
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Turn on, turn off the hard drive
★★★★★