Turning on the computer, fan noise, shutting down:
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Turn off the old monitor, Turn on
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Bios, Sound signal of a bios computer
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Turning on the laptop, fan noise, shutting
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Pressing a keypad, input error sound
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Double click computer mouse
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Disc read, CD / DVD drive
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Closes the CD / DVD tray, disc read, Opens
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Photocopy (photocopy)
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Modem connection, signal, interference
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Computer interface, signal read information
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Computer mouse movement
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Laser printer
★★★★★